N2 < F2 < Cl2 < 02 By Terms Of Increasing Average Molecular Speed At 25°C, according to the stated formula.
A molecular example is what?Molecules were inorganic entities that are composed of different molecules. Examples include typical substances like water (H2O) and carbon dioxide (CO2).
What do you mean by molecular?Two or even more atoms make up molecules. They may have the same atoms (for example, an oxygen molecule contains two oxygen atoms) or different atoms if they have more than one (a water molecule has two hydrogen atoms and one oxygen atom). Biological molecules like DNA and proteins can include thousands of atoms.
To know more about Molecular visit:
https://brainly.com/question/14614762
#SPJ4
Recommendations suggest a way that each farm could change their farming practices to prevent pollution of the river with nitrates.
The most efficient approaches to minimize nitrate pollution of rivers are to utilize biofertilizers instead of synthetic nitrogen fertilizers or to reduce their use altogether, in farming.
What is Nitrate pollution?
Groundwater and rivers may become contaminated with nitrogen from a variety of sources. The environment naturally contains a certain amount of nitrogen, and small amounts of nitrate are essential nutrients. However, there is an issue with the high nitrate levels found in significant anthropogenic contributions such as sewage, animal waste, nitrogen-based fertilizers, agricultural runoff, and fertilizers.
What are Biofertilizers?
A biofertilizer is a substance that contains living microorganisms that, when added to soil, seeds, or plant surfaces, colonize the plant's rhizosphere and encourage growth by boosting the supply or availability of essential nutrients to the host plants.
Hence, the most efficient approaches to minimize nitrate pollution in rivers are to utilize biofertilizers.
To know more about Nitrate pollution, check out:
https://brainly.com/question/27792164
#SPJ4
a hydrocarbon is combusted in an excess of air. 15.32 grams of carbon dioxide and 7.32 grams of water are produced. what is the empirical formula of the compound?
Empirical formula for your substance is C3H7. I'll demonstrate a different method for calculating the amount of carbon in moles.
What does GCSE empirical formula mean?The simplest entire number quantity of atoms from each component is the empirical formula for the compound. It is empirically determined utilizing data from experiments. For instance, while glucose has the chemical formula C 6H 12O 6, the chemical equation is CH 2O.
How does the empirical formula inform us?Molecular formulae display the quantity of each type of atom found in a molecule, while structural formulas display the simplest whole-number relationship between the atoms in a compound. Empirical formulations display the simplest whole-number relationship between the atoms in a compound.
To know more about empirical formula visit:
https://brainly.com/question/14044066
#SPJ4
diborane is a highly reactive oron hydraidw, which was once considered as a possible rocket fuel for the us space program. calculate the delta h for the symthesis of dibrone
The chemical compound diborane has the molecular formula B2H6 and is made up of boron and hydrogen atoms. Diborane is a highly reactive oron hydraidw, which was once a possible rocket fuel for the us space program
Boranes are the name given to compounds that contain both boron and hydrogen atoms. One of the most basic boron hydrides is diborane. Boron hydrides and air combine effectively to create explosive combinations. At normal temperature, this material will fire rapidly. Diborane also goes by the names boro ethane and diboron hexahydride.
At room temperature, pure diborane does not react with oxygen or air, but instead produces significant amounts of impure B2O3 and energy.
3O2 + B2H6 = 3O3 + 3H2O
H equals -2165 KJ mol-1.
Trimethyl Borate is produced when diborane and methyl alcohol combine.
6CH3OH + B2H6 = 2B(OCH3)3.
ΔH = -2165 KJ mol-1 – Diborane reacts with methyl alcohol to give trimethyl Borate. B2H6 + 6CH3OH → 2B (OCH3)3 + 6H2
to know more about trimethyl borate visit
https://brainly.com/question/26509389
#SPJ4
a student performs an experiment where gas is collected over water in an upside down graduated cylinder. if the atmospheric pressure is 739 mmhg and the level of water in the graduated cylinder is 12.5 cm higher than the level of the water exposed to the atmosphere, what is the total pressure of gases inside the graduated cylinder?
The level of water in the graduated cylinder is 12.5 cm higher than the level of the water exposed to the atmosphere, The total pressure of gases inside the graduated cylinder is 614 mmHg
given that :
The atmospheric pressure is 739 mmHg
The level of water in graduated cylinder = 12.5 cm = 125 mmHg
the expression for the pressure is given as :
P total = P atm - hρg
where , hρg = 125 mmHg
P atm = 739 mmHg
putting the values , we get :
P total = P atm - hρg
= 739 mmHg - 125 mmHg
= 614 mmHg
Thus, the total pressure inside the graduated cylinder is 614 mmHg.
To learn more about total pressure here
https://brainly.com/question/26555700
#SPJ4
Write the balanced molecular
chemical equation for the reaction of chlorine gas bubbled through aqueous sodium iodide. If no reaction occurs, simply write only NR. Be sure to include the proper
phases for all species within the reaction.
Answer:
Explanation:
Expert-Verified Answer. The balanced reaction that describes the reaction of chlorine gas and sodium iodide to produce elemental iodine and sodium chloride in aqueous solution is expressed Cl2+2NaI= I2 + 2NaCl.
A certain quantity of HI(g) is introduced to a 1.0 L container at a temperature in which K =6 for H2+ I2 = 2HI. when equilibrium is established, there are 1.8 mol I2 present. How many moles of HI were introduced originally?
The initial moles of the HI introduced is 6.2 moles.
What is the number of moles of HI?We know that the equilibrium constant can only be obtained from the concentration of the substance at the point of equilibrium. We would have to set up the ICE table as shown below;
2HI ⇆ [tex]H_{2}[/tex] + [tex]I_{2}[/tex]
I a 0 0
C - x + x + x
E a - x 1.8 1.8
We can see that in this case; x = 1.8 and the equilibrium constant = 1/6 = 0.17
K = [ [tex]H_{2}[/tex] ] [ [tex]I_{2}[/tex]]/[HI]^2
0.17 = (1.8)^2/ (a - 1.8)^2
0.17 = 3.24/(a - 1.8)^2
0.17a^2 - 0.61a + 0.55 = 3.24
0.17a^2 - 0.61a - 2.69 = 0
a=6.2 M
Learn more about equilibrium constant:https://brainly.com/question/10038290
#SPJ1
How much energy is required to remove a proton from 157n ? the masses of the atoms 157n , 146c and 11h are 15. 000109 u , 14. 003242 u and 1. 007825 u , respectively.
The energy is required to remove a proton from ¹⁵N₇ is
The reaction to remove the proton is given as follows :
¹⁵N₇ ----> ¹⁴C₆ + H
The mass of ¹⁵N₇ = 15.000109
the mass of ¹⁴C₆ = 14.003242
The mass of H = 1.007825
The energy requires to remove a proton is given as:
E = ( 14.003242 + 1.007825 - 15.000109) u
E = 0.010958 × 9312.5 MeV
E = 10.2046375 MeV
Thus, energy is required to remove a proton from ¹⁵N₇ with the masses of the atoms ¹⁵N₇ , ¹⁴C₆ and H are 15.000109 u , 14.003242 u and 1.007825 u , respectively is 10.2046375 MeV.
To learn more about proton here
https://brainly.com/question/14162227
#SPJ4
HOMOGENEOUS VS.
HETEROGENEOUS MATTER
Classify the following substances and mixtures as either homogeneous or heterogeneous.
Place a ✔️ In the correct column.
HOMOGENEOUS
1. flat soda pop
2. cherry vanilla ice cream
3. salad dressing
4. sugar
5. soil
6. aluminum foil
Name
7. black coffee
HETEROGENEOUS
HOMOGENEOUS
✔️ 1. flat soda pop
✔️ 2. cherry vanilla ice cream
✔️ 3. salad dressing
✔️ 4. sugar
HETEROGENEOUS
5. soil
aluminum foil
black coffee
Homogeneous substances and mixtures are uniform in composition and have the same properties throughout. Heterogeneous substances and mixtures are not uniform in composition and can have different properties in different parts.
Flat soda pop is a homogeneous mixture because it is a uniform mixture of water, carbon dioxide gas, and various flavors and sweeteners.
Cherry vanilla ice cream is a homogeneous mixture because it is a uniform mixture of milk, cream, sugar, cherries, and vanilla flavor.
Salad dressing is a homogeneous mixture because it is a uniform mixture of oil, vinegar, and various flavors and seasonings.
Sugar is a homogeneous substance because it is a pure substance made up of molecules with the same chemical formula.
Soil is a heterogeneous mixture because it is made up of a combination of minerals, organic matter, water, and air, which can vary in composition and properties in different parts of the mixture.
Aluminum foil is a heterogeneous mixture because it is made up of thin sheets of aluminum metal mixed with other substances, such as coatings or additives, which can vary in composition and properties in different parts of the mixture.
Black coffee is a homogeneous mixture because it is a uniform mixture of water, coffee beans, and various flavors and aromas.
The classification of the substances and mixtures as either homogeneous or heterogeneous:
HOMOGENEOUS:
Flat soda pop: ✔️
Salad dressing: ✔️
Sugar: ✔️
Black coffee: ✔️
HETEROGENEOUS:
Cherry vanilla ice cream: ✔️
Soil: ✔️
Aluminum foil: ✔️
Any material or combination that is homogeneous throughout and difficult to discern with the eye is referred to as homogeneous matter. Due to their similar composition, flat soda pop, salad dressing, sugar, and black coffee are categorized as homogenous in this example.
Contrarily, heterogeneous matter describes substances or mixes that are visibly distinct and have an uneven or non-uniform composition. Aluminum foil, cherry vanilla ice cream, and dirt are all examples of heterogeneous materials since they all have distinct visible components or phases.
To know more about Heterogenous:
https://brainly.com/question/33317866
#SPJ6
what volume of nh3 gas, at standard temperature and pressure (stp), is required to react with 15.0 g of no?
At standard pressure and temperature (STP), the volume of nh3 gas required for the reaction to 15.0 g of NO is 7.4 L.
What's the standard temperature?The definition of a standard temperature is 0 degrees Celsius, or 32 degrees F or 273.15 degrees K. In essence, this is the temperature at which pure water will freeze at sea level in air at standard pressure.
Briefing :m(NO) = 15 g; mass of nitrogen(II) oxide.
M(NO) = 30 g/mol; molar mass of nitrogen(II) oxide.
V(NH₃) = ?
n(NO) = 15 g ÷ 30 g/mol.
n(NO) = 0.5 mol; amount of nitrogen(II) oxide.
From chemical reaction: n(NO) : n(NH₃) = 6 : 4.
0.5 mol : n(NH₃) = 6 : 4.
n(NH₃) = 0.33 mol; amount of ammonia.
Vm = 22.4 L/mol; molar volume at STP.
V(NH₃) = 0.33 mol · 22.4 L/mol..
V(NH₃) = 7.4 L
To know more about standard temperature visit:
https://brainly.com/question/4519810
#SPJ4
The complete question is -
This balanced chemical equation represents a chemical reaction: 6NO + 4NH3 → 5N2 + 6H2O
What volume of NH3 gas, at Standard Temperature and Pressure (STP), is required to react with 15.0 g of NO?
When a liquid becomes a solid, the atoms in the solid usually
Answer: When a liquid becomes a solid what happens to the atoms in the solid?
The particles (atoms or molecules) are attracted to each other. The particles (atoms or molecules) vibrate but do not move past one another. The solid retains its shape.
Explanation:
The atoms in a liquid have more energy than the atoms in a solid. There is a special temperature for every substance called the melting point. When a solid reaches the temperature of its melting point, it can become a liquid. Where the Atoms vibrate but still stick together, not moving past, behind, etc of where they are.
If you know an object ditance from the un in kilometer how can you find it ditance
As, 150,000,000 km = 1 AU. To convert km to AU, divide the distance in km by 150,000,000.
In this way, we can find the distance.
What is distance?
Distance is an object's overall motion in a directionless fashion. Regardless of an object's starting or ending point, distance can be defined as the amount of ground it has travelled.
In molecular geometry, the average distance between the nuclei of two bound atoms in a molecule is referred to as bond length or bond distance.
To learn more about Distance
Here: https://brainly.com/question/71956
#SPJ4
What the frequency of an electromagnetic radiation with wavelength of 4.257 x 10^-9 m what type of EMR is this
Answer: The frequency is 7.047 Hz. It comes under ultraviolet radiation
Explanation:
We know that v = λ x f ................. (1)
where v ⇒ velocity of the wave
f ⇒ frequency of the wave
λ ⇒ wavelength of the wave
Since we know that the given wave is electromagnetic radiation,
v = 3 x 10⁸ m/s
λ = 4.257 x 10^-9 m (Given)
Substituting in (1), we get
f = v / λ
f = 3 x 10^8 / 4.257 x 10^-9
f = 7.047 x 10^16 Hz
Since the frequency is in the order of 16, the given radiation is ultraviolet radiation
To learn more about Electromagnetic radiation :
https://brainly.com/question/10429732
(c) Explain your answers in A student mixed equal volumes of Ethanol and butanoic acid. He added a few drops of concentrated Sulphuric (VI) acid and warmed the mixture (i) Name and write the formula of the main products Name... Formula.. (ii) Which homologous series does the product named in (i) above belong? ***PLEASE HELP IT'S HOMEWORK
Answer:
Products: Ethyl butanoate + Water ||| C6H12O2 + H2O
This Compound is an Ester
Explanation:
So I assume that this question is an esterification question for a few reasons.
1. Since there is a Carboxylic acid and Alcohol reacting, it automatically means that it is esterification.
2. Sulphuric Acid is used as a catalyst so it won't affect this question in any way.
* Water is formed since you'd remove H from the Alcohol's Hydroxyl group, and when you remove an OH from the carboxyl group in the carboxylic acid.
Hopefully, this helped but since I don't have much context, I had to assume that you are doing Chemistry 30, Organic Chemistry.
In a spectrophotometer, both absorbance and transmittance indicate choose. Passing through a sample. A high absorbance corresponds to a choose. Transmittance.
In a spectrophotometer, both absorbance and transmítanse indicate the amount of light passing through a sample. A high absorbance corresponds to a low transmittance.
What is absorbance?
It quantifies a substance's ability to absorb light of a certain wavelength. It is equal to the reciprocal of the transmittance logarithm. The amount of light that a solution absorbs, also known as optical density.
What is Transmittance?
It is the ratio of light energy that falls on a body to light energy that passes through it. In other words, it is the ratio of light passing through the sample to light incident on it, whereas reflectance is the ratio of light reflected to light incident.
In a spectrophotometer, both absorbance and transmittance indicate the amount of light passing through a sample. A high absorbance corresponds to a low transmittance.
To know more about absorbance and transmittance, check out:
brainly.com/question/14919298
#SPJ4
How much heat, in joules, does it take to raise the temperature of 225. 0 g of water from 25. 0°c to 100. 0°c ?.
The amount of heat required to raise the temperature of 225.0 g of water from 25.0°C to 100.0°C is equal to 67,837 joules.
What is temperature?
A physical quantity known as temperature expresses the concepts of hotness as well as coldness in numerical form. With a thermometer, temperature is measured. Thermometers are calibrated using a number of temperature scales which historically defined various reference points as well as thermometric substances. The most widely used scales are the Kelvin scale (K), which is primarily used for scientific purposes, the Fahrenheit scale (°F), as well as the Celsius scale (°C), formerly known as centigrade, with the unit symbol °C. In the Worldwide System of Units, one of the eight base units is the kelvin (SI).
The amount of heat, in joules, required to raise the temperature of 225.0 g of water from 25.0°C to 100.0°C can be calculated using the equation:
Q = mcΔT
where
Q = heat in joules,
m = mass of the water in grams,
c = specific heat capacity of water,
ΔT = change in temperature (100.0°C – 25.0°C = 75.0°C).
Using these values, the equation can be rearranged to:
Q = (225.0 g) (4.184 J/g°C) (75.0°C)
Therefore, the amount of heat required to raise the temperature of 225.0 g of water from 25.0°C to 100.0°C is equal to 67,837 joules.
To learn more about temperature
https://brainly.com/question/1156488
#SPJ4
Identify the Bronsted-Lowry acid (loses an H+ ion), base (gains an H+ ion) and the conjugate acid, and the conjugate base in each of the following.
a. HNO3 + H2O <---> H3O+ + NO3-
A B C.A. C.B.
b. NH3 + H2O <---> NH4+ + OH-
c. H2SO4 + OH-<---> HSO4- + H2O
d. C2H3O2– + H2O <---> OH- + HC2H3O2
e. H2PO4- OH-<---> HPO4-2 + H2O
f. H2PO4- + H3O+ <---> H3PO4 + H2O
g. HCO3– + H2O <---> H3O+ + CO3-2
h. HCO3– + H2O <---> H2CO3 + OH-
The Bronsted-Lowry acid, base and the conjugate acid, and the conjugate base in each of the following reactions are mentioned below serially:
Bronsted-Lowry acid Bronsted-Lowry base
HNO₃ H₂O
H₂O NH₃
H₂SO₄ OH⁻
H₂O C₂H₃O₂⁻
H₂PO₄⁻ OH⁻
H₃O⁺ H₂PO₄⁻
HCO₃⁻ H₂O
H₂O HCO₃⁻
Conjugate acid: Conjugate base:
H₃O⁺ NO₃⁻
NH₄⁺ OH⁻
H₂O HSO₄⁻
HC₂H₃O₂⁻ OH⁻
H₂O HPO₄²⁻
H₃PO₄ H₂O
H₃O⁺ CO₃²⁻
H₂CO₃ OH⁻
What are Bronsted-Lowry acid and base?Bronsted-Lowry acids are substances that donate protons or H+ ions to other compounds to form conjugate bases. Bronsted-Lowry bases are substances that accept protons or H+ ions from other compounds to form conjugate acids.
For the given reactions:
a. HNO₃ + H₂O <---> H₃O⁺ + NO₃⁻
Bronsted-Lowry acid: HNO₃
Bronsted-Lowry base: H₂O
Conjugate acid: H₃O⁺
Conjugate base: NO₃⁻
b. NH₃ + H₂O <---> NH₄⁺ + OH⁻
Bronsted-Lowry acid: H₂O
Bronsted-Lowry base: NH₃
Conjugate acid: NH₄⁺
Conjugate base: OH⁻
c. H₂SO₄ + OH⁻ <---> HSO₄⁻ + H₂O
Bronsted-Lowry acid: H₂SO₄
Bronsted-Lowry base: OH⁻
Conjugate acid: H₂O
Conjugate base: HSO₄⁻
d. C₂H₃O₂⁻ + H₂O <---> OH⁻ + HC₂H₃O₂
Bronsted-Lowry acid: H₂O
Bronsted-Lowry base: C₂H₃O₂⁻
Conjugate acid: HC₂H₃O₂⁻
Conjugate base: OH⁻
e. H₂PO₄⁻ + OH⁻ <---> HPO₄²⁻ + H₂O
Bronsted-Lowry acid: H₂PO₄⁻
Bronsted-Lowry base: OH⁻
Conjugate acid: H₂O
Conjugate base: HPO₄²⁻
f. H₂PO₄⁻ + H₃O⁺ <---> H₃PO₄ + H₂O
Bronsted-Lowry acid: H₃O⁺
Bronsted-Lowry base: H₂PO₄⁻
Conjugate acid: H₃PO₄
Conjugate base: H₂O
g. HCO₃⁻ + H₂O <---> H₃O⁺ + CO₃²⁻
Bronsted-Lowry acid: HCO₃⁻
Bronsted-Lowry base: H₂O
Conjugate acid: H₃O⁺
Conjugate base: CO₃²⁻
h. HCO₃⁻ + H₂O <---> H₂CO₃ + OH⁻
Bronsted-Lowry acid: H₂O
Bronsted-Lowry base: HCO₃⁻
Conjugate acid: H₂CO₃
Conjugate base: OH⁻
To know more about Bronsted-Lowry acid and base, visit:
https://brainly.com/question/14938928
#SPJ1
how many lone pairs of electrons does the oxygen atom with the negative charge bear? (enter answer as a number.)
As a result, we already have one bond. We require three lone pairs of electrons for the oxygen to have a negative one formal charge.
How many lone pairs does a negatively charged oxygen have?Three unpaired electrons and one non-bonding lone pair on the oxygen can be utilized to make bonds with three hydrogen atoms.
An oxygen atom has three valence electron pairs since it has six valence shell electrons. Since oxygen creates two bonds, we know that two electrons are required to create those two bonds. There are now just two electron pairs remaining that are not involved in bonding.
There are three valence electron pairs in an oxygen since it has six valence shell electrons.
learn more about non-bonding lone pair refer
https://brainly.com/question/20355152
#SPJ4
Mention how a halogen substituent can be replaced by a deuterium atom in the preparation of a deuterated compound
A halogen substituent can be replaced by a deuterium atom in the preparation of a deuterated compound :
CH₃CHBrCH₂CH₃ + Mg + ether ---> CH₃CHMgBrCH₂CH₃ + D₂O -->
CH₃CHDCH₂CH₃
In The reaction with the deuterium donor , the Grignard reagent converts into R- D . the grignard reagent react with proton donor to convert R - MgX to R-H. The grignard reagent the magnesium salt. the grignard reagent is an organometallic compound. the formula for the grignard reagent is RMgX.
CH₃CHBrCH₂CH₃ + Mg + ether ---> CH₃CHMgBrCH₂CH₃
CH₃CHMgBrCH₂CH₃ + D₂O --> CH₃CHDCH₂CH₃
Thus, the above reaction is the preparation of a deuterated compound.
To learn more about deuterated here
https://brainly.com/question/29582706
#SPJ4
Which is a product of photosynthesis and a reactant of cellular respiration?
Multiple choice question.
carbon dioxide
water
glucose
B) Carbon Dioxide
Cellular respiration is the process by which plant and animal cells break down sugars, convert them to energy, and then use them to do work at the cellular level. The purpose of cellular respiration is simple. It provides cells with the amount of energy they need to function. It would be absolutely useless if a living being could not obtain the necessary energy from food. All living things eventually die, regardless of the quality or quantity of food.
To learn more about photosynthesis click here: https://brainly.com/question/26568636
the following solutions are prepared by dissolving the requisite amount of solute in water to obtain the desired concentrations. rank the solutions according to their respective osmotic pressures in decreasing order assuming the complete dissociation of ionic compounds.
According to the given statement the complete dissociation of ionic compounds is C₆H₁₂O₆ < NaCl ≈ CH₃OH < MgCl₂.
What exactly is compound?A composite is a material created by the chemical fusion of two or more elements. Bonds and metallic bonding are two typical forms of bonds that hold components in a compound together. Any synthesis will always include each ingredient in a specific ratio.
Briefing:The formula for osmotic pressure (Π) is
Π = icRT
If T is constant,
Π = kic
C₆H₁₂O₆:
Π
= k × 1 × 1 = k
MgCl₂:
Π
= k × 3 × 1 = 3k
CH₃OH:
Π
= k × 1 × 2 = 2k
NaCl:
Π
= k × 2 × 1 = 2k
The order of osmotic pressures is
C₆H₁₂O₆ < NaCl ≈ CH₃OH < MgCl₂
To know more about Compound visit:
https://brainly.com/question/13516179?
#SPJ4
The complete question is -
The following solutions are prepared by dissolving the requisite amount of solute in water to obtain the desired concentrations. Rank the solutions according to their respective osmotic pressures in decreasing order assuming the complete dissociation of ionic compounds. Rank from highest to lowest osmotic pressure. To rank items as equivalent, overlap them. 1M C6H12O6, 1M MgCl2, 2M CH3OH, 1M NaCl
What is the difference, on a molecular level, between a gas, liquid, and solid
The reaction between aluminum and an aqueous solution of copper (I) sulfate
is represented by the equation below.
2Al(s) + 3 CuSO+ (aq) - › Al2 (SO4)3 (aq) + 3 Cu(s)
How many atoms does 6 moles of Al(s) contain?
The number of atoms contained by 6 moles of aluminium is 3.612 × 10²⁴ atoms of Al.
How to calculate number of atoms?The number of atoms contained by a substance can be calculated by multiplying the number of moles in the substance by Avogadro's number.
Avogadro's number is the number of atoms present in 12 grams of isotopically pure carbon-12, being 6.02214076 × 10²³. By definition, it is the number of elementary entities (atoms or molecules) comprising one mole of a given substance.
According to this question, a reaction occurs between aluminum and aqueous solution of copper (I) sulfate. If there are 6 moles of aluminium, the number of atoms in this aluminium can be calculated as follows:
no of atoms = 6 × 6.02 × 10²³
no of atoms = 36.12 × 10²³
no of atoms = 3.612 × 10²⁴ atoms of Al
Therefore, 3.612 × 10²⁴ atoms of Al is the number of atoms contained in 6 moles of aluminium.
Learn more about atoms at: https://brainly.com/question/8834373
#SPJ1
Question 4 (4 points)
(02.07 MC)
Title: CHM-U4-4.08-Std3a-4
Read the given expression.
X = number of protons - number of core electrons
Which of the following explains the identity of X and its trends across a period? (5 points)
O a
Oc
X is the effective nuclear charge, and it remains constant across a period.
X is the screening constant, and it remains constant across a period.
X is the effective nuclear charge, and it increases across a period.
X is the screening constant, and it increases across a period.
Next Page
Back
The effective nuclear charge, denoted by the letter X, grows with period, and this is the right response to the question above.
Here, X stands for the effective nuclear charge. And it may be computed by deducting the number of core electrons from the amount of protons. The positive attraction that nuclear protons exert on valence electrons is known as the effective nuclear charge. Due to the shielding effect, the effective nuclear charge is always lower than the total amount of protons in a nucleus.
Despite the fact that nuclear charge rises as atomic number increases in both period and group. In a group and over a period, the effective nuclear charge exhibits opposing patterns. It increases along with period (due to increasing nuclear charge with no accompanying increase in shielding effect). And decreases in group (although nuclear charge increases down a group, shielding effect more than counters its effect).
To know more about electrons visit:
https://brainly.com/question/1255220
#SPJ1
do the initial concentrations afect the equilibrium concentrations of reactants and products of a given reaction?
No, the initial concentrations affect the equilibrium concentrations of reactants and the products.
The equilibrium constant does not depend on the initial concentration of reactants but depends on concentration of various species at equilibrium .
The equilibrium constant is the ratio between the product of the molar concentrations of the products to that of the product of the molar concentrations of the reactants with each concentration term raised to a power equal to stoichiometric coefficient in the balanced chemical equation.
If you increase the concentration of a reactant or product participated in an equilibrium, the system will absorb some of the added material and after some time the system will re establish equilibrium. When you recalculate Keq, you get the same value.
It changes with the change in the temperature.
To look more about equilibrium constant click here
brainly.com/question/10038290
#SPJ4
What is usually released in a combustion reaction?
Answer:
heat energy
Explanation:
I think because of the collisions of all the atoms/molecules that were accelerated because of the heat from the initial reaction and first collisions, heat is generated.
also, oxygen is added to the flame from the air as well :)
Which changes of state are characterized by having atoms that gain energy? check all that apply. Meltingsublimationfreezingvaporizationcondensationdeposition.
Melting, vaporization and sublimation are changes of state that are characterized by atoms that gain energy.
What is Melting?
The physical process that causes a substance's phase to change from solid to liquid. This happens when the solid's internal energy rises, usually as a result of heat or pressure being applied, which raises the substance's temperature to the melting point.
What is vaporization?
The transformation of a substance into a gaseous (vapour) phase from its liquid or solid state. Boiling is the term for the vaporization process when conditions permit the creation of vapour bubbles within a liquid.
What is Sublimation?
The immediate transition of a material from its solid to its gas state without first going through its liquid phase is called the sublimation process.
Hence, melting, vaporization and sublimation are changes of state that are characterized by atoms that gain energy.
To know more about Vapourization, check out:
https://brainly.com/question/486624
#SPJ4
if your isolated product has succinimide present, what key feature should be present in the ir spectrum of your product?
If the product contain succinimide, its IR spectra should show aprominent peak at around 1700 cm-1, indicating an incomplete reaction.
What defines an element's spectrum?Because various elements have varying quantities of protons and varied numbers and configurations of electrons, they also have different spectra. The variations in spectra are a result of the energy that atoms absorb or emit as their electrons shift between different energy levels.
Is there a spectrum for every element?Every element generates an own collection of spectral lines. A line spectrum can be used to distinguish between different elements because no two produce the same spectral lines.
To know more about spectrum visit:
https://brainly.com/question/6836691
#SPJ4
You add 100.0 g of water at 60.0 °C to 100.0 g of ice at 0.00 °C. Some of the ice melts and cools the water to 0.00 °C. When the ice and water mixture has come to a uniform temperature of 0 °C, how much ice has melted?
The melting ice weighs 50.3 grams. When the ice and water mixture has come to a uniform temperature of 0 °C.
Where is the mass of melted ice located?Subtracting the combined mass of the cup, water, and ice cubes from the combined mass of the cup, water, and ice cubes yields the mass of the ice cubes.
where,
q = heat released
m = mass of water = 100 g
c = specific heat capacity of water = 4.186 J/g.°C
T = change in temperature = 60-100 = -40
Putting values in equation , we get:
q = 100 * 4.186 * -40
q = -16744j
Ice will absorb the heat that the water releases.
So, amount of heat absorbed by ice = -q = -(-16744) J = 16744 J
We employ the following equation to determine the reaction's enthalpy change:
H = q/m
where,
q = amount of heat absorbed = 16744 J
m = mass of ice melted = ?
H = heat of fusion = 333 J/g
Putting values in equation , we get:
333J/g = 1674/ m
m = 1674 / 333 = 50.3g
Consequently, 50.3 g of ice will have melted
To know more about melting ice visit:-
https://brainly.com/question/3182291
#SPJ4
What is the concentration of ppmv of carbon monoxide with a concentration of 103.
8.999×10^-2 ppmv is the concentration of ppmv of CO.
How to calculate concentration of ppmv CO?Concentration is defined as amount of solute per amount of solution or solvent.
To convert from ppm by mass to ppm by volume, divide by the density of the particles.
Calculation:The conc of CO = 103 mg/m³
=0.103 mg/m³ air
Molecular weight if CO = 28g/mol
Moles of CO = 0.103×10^-3 g/28g/mol
= 3.678×10^-6 mol
Calculate the volume of CO as follows:
V=nRT/P
=3.678×10^-6 mol × 8.314 Pa m³/mol K × 298.15 / 101325 Pa
= 8.999×10^-8 m³ CO/m³ air
Convert units of V into pmv as follows
=8.999×10^-8 m³ CO/m³ air ×10^6
=8.999×10^-2 ppmv
Or 0.08999 ppmv
To know more about concentration, click on https://brainly.com/question/17206790
#SPJ4
Ammonia gas has a molar mass of approximately 13 grams per mole. At 260K and 2.6 atm, a sample of ammonia has a volume of 2.5 L. In three to five sentences, explain how you can find the mass of the ammonia. Then, given R= 0.0821L⋅atm/mol⋅K, calculate the mass.
The mass of the ammonia, given that the sample of the ammonia has a volume of 2.5 L is 3.965 g
How do I determine the mass of the ammonia?First, we shall obtain the number of mole of the ammonia. Details below:
Temperature (T) = 260 KPressure (P) = 2.6 atmVolume (V) = 2.5 LGas constant (R) = 0.0821 atm.L/Kmol Number of mole (n) =?PV = nRT
Divide both sides by RT
n = PV / RT
n = (2.6 × 2.5) / (0.0821 × 260)
n = 0.305 mole
Now, we shall determine the mass of the ammonia. Details below:
Mole of ammonia = 0.305 moles Molar mass of ammonia = 13 g/molMass of ammonia =?Mole = mass / molar mass
Cross multiply
Mass = Mole × molar mass
Mass of ammonia = 0.305 × 13
Mass of ammonia = 3.965 g
Thus, we can conclude that the mass of the ammonia is 3.965 g
Learn more about mass:
https://brainly.com/question/6613610
#SPJ1