The mass in grams of the 254 mL of the liquid, given that it has a density of 1.24 g/cm³ is 314.96 grams
How to determine the mass of the liquidWe'll begin by listing the out the parameters obtained from the question. This is given below:
Density of liquid = 1.24 g/cm³Volume of liquid = 254 mL = 254 cm³Mass of liquid =?The mass of the liquid can be obtained as follow:
Density = mass / volume
Cross multiply
Mass = Density × Volume
Mass of liquid = 1.24 × 254
Mass of liquid = 314.96 grams
Thus, the mass of the liquid is 314.96 grams
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Gaseous ammonia chemically reacts with oxygen (O₂) gas to produce nitrogen monoxide gas and water vapor. Calculate the
moles of water produced by the reaction of 1.1 mol of ammonia. Be sure your answer has a unit symbol, if necessary, and
round it to 2 significant digits.
?
The moles of water produced by the reaction of 1.1mol of ammonia with oxygen gas will be 1.65moles.
According to given reaction in the question,
2NH₃(g) + 5/2O₂ --- 2NO(g) + 3H₂O(g)
1.1mole
We know,
mole of H₂O ÷ coefficient of H₂O = mole of NH₃ ÷ coefficient of NH₃
mole of H₂O ÷ 3 = 1.1 ÷ 2
moles of H₂O = 1.65 or 1.6 moles
Therefore, the moles of water produced by the reaction of 1.1mol of ammonia with oxygen gas will be 1.65moles.
When the gaseous ammonia reacts with the oxygen we obtain nitrogen monoxide and water vapour. This reaction is a combustion reaction as well as a red-ox reaction.
Moreover, it is an exothermic process as a large amount of heat is liberated.
An oxidation-reduction(redox) reaction is a type of chemical reaction that involves a transfer of electrons between two species.
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If 0.250 mol of red phosphorus reacts with 0.625 mol of yellow sulfur , what is the empirical formula of the product
Answer:
P2S5
Explanation:
This answer is pretty much asking for two numbers that are mutually prime and have a ratio of 0.25 to 0.625
0.25 = 1/4
0.625 = 5/8
the ratio of 0.25 to 0.625 would thus equal 1/4:5/8 which is 0.4
So, two numbers that are mutually prime and divide to 0.4
Set up the equation:
x/y = 0.4 where x is the moles of red phosphorus and y is the moles of sulfur.
With some trial and error, it's easy to find out that 2 and 5 are the solutions.
Since x = 2 and y = 5, the subscripts for the PxSy compounds are found.
P2S5 would be the empirical formula
Chromium has three naturally-occurring isotopes. It is 80% Chromium-52, 14% Chromium-53, and 6% Chromium-51. What is the average atomic mass?520.80 amu 5208 amu 52.08 amu 79.62 amu
PLEASE HELP
The average atomic mass of chromium with three isotopes is 52.08amu (option C).
How to calculate average atomic mass?Average atomic mass is the weighted average of the atomic masses of the naturally occurring isotopes of an element.
The average atomic mass of an isotopic element can be calculated as follows:
80% Chromium-5214% Chromium-536% Chromium-51Average atomic mass = (80% of 52) + (14% of 53) + (6% of 51)
Average atomic mass = 41.6 + 7.42 + 3.06
Average atomic mass = 52.08amu.
Therefore, 52.08amu is the average atomic mass of the chromium isotopes.
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Magnesium + Silver Nitrate →Determine the reaction typeFinish the word equationWrite a balanced chemical reactionFor Double displacement include a net ionic equation (you don’t know double displacement yet!)For single replacement state the transfer of electrons
Explanation:
For this question, we need to know that:
Magnesium is Mg
Silver Nitrate is AgNO3
So the complete and balanced reaction is:
Mg + 2 AgNO3 → Mg(NO3)2 + 2 Ag
Also, we need to know that is it a single replacement equation.
Single replacement reactions are those that occur between a compound substance (made up of more than one chemical element) and a simple substance (made up of only one type of chemical element), giving rise to another simple substance and another compound.
Generically, we have:
A + CD → AC + D
This is the case of this reaction.
Answer:
Determine the reaction type
Single replacement.
Finish the word equation
Magnesium + Silver Nitrate → Magnesium nitrate + silver
Write a balanced chemical reaction
Mg + 2 AgNO3 → Mg(NO3)2 + 2 Ag
For single replacement state the transfer of electrons
Electrons are transferred from magnesium to silver.
Which types of orbitals are found in the principal energy level n=2?
The kind of orbitals precisely found in the principal energy level n=2 are the one 2s orbital and three 2p orbitals
Why the n=2 orbital has four orbitals?It follows that in the electronic configuration of elements describes the distribution of electrons of elements is shared into different energy levels through the orbitals.
In the second orbital, there are actually four different types of orbitals which are found here, these are:
The one 2s orbitalThe three 2p orbitals.The position of elements in the periodic table is largely based on the shared electrons of atoms which are being technically distributed at various level.
An element is a substance which cannot be split into different forms by ordinary means. Electrons revolve around the orbits of atoms of elements.
So therefore, from the given explanation above, it can be deduced that the the second energy level has four different orbitals.
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H₂Se
# of Valence e" =
Lewis Structure:
Draw the Molecular Geometry
(using dashes and wedges):
Se
of e Groups =
Hybridization =
Electronic Geometry:
Molecular Geometry:
Polar or Nonpolar?
the correct answer is electrons
Which statement best describes the mass numbers of the atoms in the reaction?
OThere is one atom with a mass number of 1
O There are two atoms with mass numbers of 2.
OThere is one atom with a mass number of 2.
O There are two atoms with mass numbers of 1.
There are two atoms with mass numbers of 2 best describes the mass numbers of the atoms in the reaction
What is a Mass number ?The sum of protons and neutrons in an atomic nucleus is known as the mass number, often known as the atomic mass number or nucleon number. It roughly equates to the atom's atomic mass given in atomic mass units.
They are collectively referred to as nucleons since protons and neutrons are both present in the atomic nucleus. An atom of carbon, for instance, has 6 protons and 6 neutrons. Its mass number is therefore 12. All atoms of an element have the same number of protons, but their neutron counts can differ.Learn more about Mass number here:
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someone pls tell me what this is
Answer:
Rights
Explanation:
Every human has their rights such as those stated. These rights are what is protected by law.
Among the following travelling objects, which has the shortest de Broglie
wavelength?
Hint. It is not necessary to calculate the wavelength for each object. The quickest
way to answer this question is to consider how the de Broglie wavelength depends
on the momentum (mass x speed).
ma
O
A Boeing 777 airplane (mass 2.5×105 kg) flying at a speed of 250 m/s (560 mph)
A bird of mass 2x10-2 kg flying at a speed of 10 m/s
A car of mass 2x10³ kg driving at a speed of 50 m/s
HADEMA kelaparas pasikei
E OS
KAMA MŪ
A person of mass 80 kg running at a speed of 3 m/s
A Neon atom (mass 3.4×10-26
danaume
para
kg) traveling at a speed of 3×10³ m/s
Among the following travelling objects, which has the shortest de Broglie wavelength, Neon atom (mass 3.4×10-26 kg) traveling at a speed of 3×10³ m/s.
What is de Broglie wavelength?
The de Broglie wavelength is an important term to understand when studying quantum mechanics. The de Broglie wavelength () is the wavelength () associated with an item in relation to its momentum and mass. The de Broglie wavelength of a particle is usually inversely related to its force.Matter is thought to have a wave-particle dual nature. De Broglie waves, named after the discoverer Louis de Broglie, are the characteristics of a material item that fluctuates in time or space while acting like waves. It is sometimes referred to as matter-waves. It is very similar to the dual nature of light, which has been empirically demonstrated to act as both a particle and a wave.
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3. The element with electronic configuration 2.8.6 *
To know the element with eletronic configuration 2.8.6 we need to:
First:
do the eletronic distribution - 1s² 2s² 2p⁶ 3s² 3p⁶
What is the molecular geometry of CF4
The molecular geometry of CF4 is tetrahedral because it has all fluorine atoms in the surrounding.
Shown below is a carbocation intermediate in an electrophilic addition reaction of HCl with two different alkenes. Draw structural formulas for both of the alkenes.
Carbocation intermediate in an electrophilic addition reaction of HCl with two different alkenes and the structural formulas for both of the alkenes are 1,3 dimethyl butene
Carbocation is the molecule in which the carbon has the positive charge and three bond and it is an organic molecule, an intermediate, that forms as a result of the loss of two valence electrons, normally shared electrons, from a carbon atom that already has four bonds
Here given diagram is attached and is a carbocation intermediate in an electrophilic addition reaction of HCl with two different alkene and then two alkenes are form which is 1,3 dimethyl butene and given below the structure formula for 1,3 dimethyl butene
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Over time, a crusty deposit of calcium carbonate forms on the heating element inside a kettle.
Use your understanding of acids and bases to suggest a way to remove the deposit
Calcium carbonate deposits in heating elements can be eliminated by way of cleansing these with an acid (like vinegar or lemon juice). This acid will react with the calcium carbonate to provide salt, water, and carbon dioxide gas.
Calcium carbonate is a nutritional supplement used whilst the amount of calcium taken in the weight loss plan is not enough. Calcium is needed via the frame for healthful bones, muscle groups, anxious devices, and the heart. Calcium carbonate also is used as an antacid to relieve heartburn, acid indigestion, and a disillusioned stomach.
Calcium carbonate is the salt of a sturdy base (due to the presence of the calcium ion) and a vulnerable acid (because of the presence of the carbonate ion, generally derived from carbonic acid). consequently, this salt is mildly basic in nature.
Calcium carbonate reacts with water that is saturated with carbon dioxide to shape the soluble calcium bicarbonate. This response is essential in the erosion of carbonate rock, forming caverns, and results in difficult water in lots of regions.
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Sue has a cup of hot chocolate and a cup of cold chocolate milk. Select the statement that describes which drink
has more kinetic energy.
Answer:
The cup of hot chocolate.
Explanation:
Thermal energy is measured based on the amount of kinetic energy in an object. Thus, concluding that the cup of hot chocolate contains more kinetic energy than the cup of cold chocolate milk.
Hope this helps!
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A map showing the acidity of rain across the United States is provided. The pattern of acid rain is best explained by which of the following observations?
The patterns of acid rain is best explained on the basis of it's ph observations.
Rain or any other form of precipitation that is unusually acidic, is referred to as acid rain (low pH). The Northeastern United States contains the regions with the highest levels of acidity (lowest pH values). The Northeast's concentration of industrial and power facilities, numerous cities, and dense population are to blame for this trend of high acidity.
Infrastructure, marine life, and plants can all be harmed by acid rain. Sulfur dioxide and nitrogen oxide emissions cause acid rain by reacting with the water molecules in the atmosphere to create acids. It has been noted that acid rain also has negative effects on forests, freshwaters, and soils. It also kills insect and aquatic life-forms, damages structures, and has an effect on human health.
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Find the energy in kJ for an x-ray photon with a frequency of 2.4 X 1018 s-1.
The energy for the x-ray photon is 1.619x10⁻³³ kJ.
Describe energy.The quantitative characteristic that is conveyed to a body or to a physical system in physics is called energy. Energy can be observed in the performance of labor as well as in the form of heat and light. Energy is a limited resource that can only be changed from one form to another and cannot be created or destroyed, in accordance with the principle of energy conservation.
The SI's (International System of Units) unit of energy measurement is the joule (J). Common types of energy include the kinetic energy of a moving object, the potential energy of a stationary object, the elastic energy of a stationary object, the chemical energy associated with chemical reactions, the radiant energy of electromagnetic radiation, and the internal energy of a thermodynamic system.
Given, frequency of photon (v) = 2.4x1018 s⁻¹
Planck's constant (h) = 6.63x10⁻³⁴ J s
Energy (E) = h x v = 6.63x10⁻³⁴ x 2.4x1018
= 1.619x10⁻³⁰ J
= 1.619x10⁻³³ kJ
Hence, the energy for the x-ray photon with a frequency of 2.4x1018 s⁻¹ is 1.619x10⁻³³ kJ.
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Nitrogen is collect over water at 40 Celsius . The partial pressure due to water vapor is 7.38 kPA at 40 Celsius , what is the partial pressure of nitrogen if the total pressure is 99.42 kPa?
There is a partial pressure for each gas in a mixture of gases, which is the pressure that would exist if that gas alone filled the whole volume of the initial combination at the same temperature.
One of two methods can be used to compute partial pressures:
Use PV = nRT to calculate the individual pressure of each gas in a mixture.
Utilizing the mole fraction of each gas, determine the proportion of pressure from the total pressure that may be ascribed to each individual gas.
When attempting to predict gas movement, partial pressure must be taken into account. Recall that the pressure of gases usually equalizes across nearby locations. From one area with a greater partial pressure to another with a lower partial pressure, a gas will move.
By dividing the mole fraction by the total pressure of a gas, one can calculate its partial pressure. Since it is based solely on the quantity of particles present rather than the nature of the gas, the Ideal Gas Equation remains true for mixes of gases just as it does for pure gases.
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An oil tanker holds 3.24 • 10^7 gallons of crude oil. The mass of the oil is 2.13 • 10^8 pounds. What is the density of the oil in kilograms per liter?
Answer
The density of the oil in kilograms per liter is 0.78775
Explanation
Note: 1 gallon = 3.78541 liters
1 pound = 0.453592 kilogram
Given:
The gallons (volume) of crude oil = 3.24 x 10⁷ gallons
The mass of the crude oil = 2.13 x 10⁸ pounds
Conversion:
The volume in liters of 3.24 x 10⁷ gallons of crude oil will be
[tex]\begin{gathered} =3.78541\times3.24\times10^7 \\ =1.22647\times10^8\text{ liters} \end{gathered}[/tex]Also, the mass in kilograms of 2.13 x 10⁸ pounds of crude oil will be
[tex]\begin{gathered} =0.453592\times2.13\times10^8 \\ =9.6615\times10^7\text{ kilograms} \end{gathered}[/tex]Now, we shall use the formula below to calculate the density
[tex]\begin{gathered} \text{Density = }\frac{Mass\text{ in kilograms}}{\text{Volume in liter}} \\ \text{Mass in kilograms = 9.6615 }\times10^7 \\ Volume\text{ in liters =}1.22647\times10^8 \\ \therefore Density\text{ in kilograms per liter = }\frac{\text{9.6615 }\times10^7}{1.22647\times10^8}=0.78775^{} \end{gathered}[/tex]1.)What do you call a way of acquiring knowledge through experiment?
a.Academic method C.Scientific method
b.Experimental method d.Scietific notation
2.)What is the first method you must do in order to make a research theory?
a.Share the results c.Observe and question
b.Analyze and conclude d.Formulate a hypothesis
3.)Which of the following is the MOST important trait in the first step of scientific method,observe and question?
a.Senses C.Teamwork
b.Mathematical Formula d.Scientific Values
4.)What is the last step you must do in order to make a research theory?
a.Share the results c.Observe and question
b.Analyze and conclude d.Formula and a hypothesis
5.)Which of the following traits must you AVOID in making and analyzing a conclusion?
a.Be objective c.Be biased
b.Be sensible d.Include scientific values
Answer: B,C,not sure,A,C
Explanation:
Carbohydrates serve as a vital source of chemical energy to the human body. Carbohydrates are broken down into smaller units of glucose, among other sugars, providing energy to various muscles and organs, including the brain. On average, for every 10.0 g of carbohydrates consumed, the body will store 170 kJ of energy.
The kilocalories of the 170KJ energy value = 40.6 kcal
What are carbohydrates?Carbohydrate is defined as the major class of nutrients in food and food products that are organic macromolecule which are capable of giving body energy when broken down to its smallest unit called glucose.
The functions of carbohydrates in the body include the following:
They provide energy to the body.They spare the use of proteins in the body for energy.They assist in lipid metabolism.For every 10 g of carbohydrates that is being consumed, 170 kilojoules of energy is obtained.
To convert 170 kilojoules to kilocalories;
1 kilocalorie = 4.184 kilojoules
X kcal = 170 kJ
make X kcal the subject of formula,
X kcal = 170/4.184
X kcal = 40.6 kilo calories.
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Help
- Correct answer to multiple choice = marked, rated to max& thanked
Which of the following sets of quantum numbers contains an error?Group of answer choices:n = 4, l = 3, ml = -2, ms = -1/2n = 2, l = 0, ml = +2, ms = -1/2n = 3, l = 2, ml = 0, ms = -1/2n = 3, l = 1, ml = +1, ms = +1/2n = 2, l = 1, ml = 0, ms = -1/2
Answer
n = 2, l = 0, ml = +2, ms = -1/2
n = 3, l = 1, ml = +1, ms = +1/2
Explanation
In atoms, there are a total of four quantum numbers namely;
The principal quantum number (n), n = 1, 2, 3, ....
The orbital angular momentum quantum number (l), for n = 3, l = (n - 1) = 0, 1, 2, The magnetic quantum number (ml), for l = 2, ml = (-l, 0, +l) = -2, -1, 0, +1, +2, and The electron spin quantum number (ms), ms = -1/2, +1/2
Therefore, the following sets of quantum numbers contains an error among the given sets:
n = 2, l = 0, ml = +2, ms = -1/2
n = 3, l = 1, ml = +1, ms = +1/2
The equation of line t is y=–
1
7
x–2. Parallel to line t is line u, which passes through the point (7,6). What is the equation of line u?
The equation of line u, given that it is parallel to line t is:
y = –17x – 113
How to determine the equation of line uWe know that the equation of straight line is given as
y = mx + c
Where
y is the coordinate on y-axis x is the coordinate on x-axis m is the slope or gradient c is the intercept on y-axisFirst, we shall determine the slope of line u. This can be obtained as follow:
y = –17x – 2
Comparing y = mx + c with y = –17x – 2,
The slope (m₁) = –17
Recall,
The slope of parallel lines are equal.
Thus,
The slope of line u, is given as:
m₂ = m₁ = –17
Finally, we shall obtain the equation of line u as follow:
Coordinate = (7, 6) x coordinate 1 (x₁) = 7y coordinate 1 (y₁) = 6Slope of line u (m₂) = –17Equation of line u=?y – y₁ = m₂(x – x₁)
y – 6 = –17(x – 7)
Clear bracket
y – 6 = –17x – 119
Rearrange
y = –17x – 119 + 6
y = –17x – 113
Thus, the equation of line u is y = –17x – 113
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Answer:
Equation of line is given as y = mx + c, where m is the gradient and c is the y-intercept.
Parallel lines have the same gradient so gradient of line u is -17.
Equation of line u is y = -17x + c
Substitute (7,6) into the equation to find c.
6 = -17(7) + c
c = 125
Hence, equation of line u is y = -17x + 125.
Perform the following operationand express the answer inscientific notation.9.2x107 = 3.7x109[][ ? ]x10?)Coefficient (green)Exponent (yellow)Enter
ANSWER
Coefficient = 2.49
Exponent = -2
STEP-BY-STEP EXPLANATION:
From the question provided, you are asked to simplified the below expression
[tex]9.2\cdot10^{7\text{ }}\div3.7\cdot10^9^{}[/tex]The expression can be re-arrange below as
[tex]\frac{9.2\cdot10^7}{3.7\cdot10^9}[/tex][tex]\begin{gathered} \text{ According to the 2nd law of indicies, recall that, } \\ x^a\text{ }\div x^b=x^{a\text{ - b}} \end{gathered}[/tex][tex]\begin{gathered} =\frac{9.2}{3.7}\cdot10^{7\text{ - 9}}^{} \\ =2.49\cdot10^{-2} \end{gathered}[/tex]Therefore, the coefficient is 2.49 and the Exponent is -2
The equilibrium constant for the reaction 2 HF (g) ⇌ H₂ (g) + F₂ (g) is 0.270 at a particular temperature. What is the equilibrium constant for the equation ½ H₂ (g) + ½ F₂ (g) ⇌ HF (g)?
If the equilibrium constant for the reaction 2 HF (g) ⇄ H₂ (g) + F₂ (g) is 0.270 than equilibrium constant for the equation ¹/₂ H₂ (g) + ¹/₂ F₂ (g) ⇄ HF (g) is 1.924.
Initial equation is 2 HF (g) ⇄ H₂ (g) + F₂ (g)
Final equation is ¹/₂ H₂ (g) + ¹/₂ F₂ (g) ⇄ HF (g)
On reversing the equation of reaction, the equilibrium constant of the reversed reaction is inverse of the equilibrium constant of the forward reaction.
For reaction H₂ (g) + F₂ (g) ⇄ 2HF (g), equilibrium constant will be inverse of 0.270. Let the equilibrium constant of reaction H₂ (g) + F₂ (g) ⇄ 2HF (g) be K₁. Then, the Value of K₁ is given as
K₁ = 1 ÷ 0.270 = 3.7037
On changing the stoichiometric coefficient by a factor let's say x, then the equilibrium coefficient of the changed reaction is the equilibrium constant of the unchanged reaction raised to the power x.
According to the question, the value of x is ¹/₂. So, the equilibrium constant of reaction ¹/₂ H₂ (g) + ¹/₂ F₂ ⇄ HF (g), will root of K₁. Let the equilibrium constant of the reaction ¹/₂ H₂ (g) + ¹/₂ F₂ ⇄ HF (g) be K₂. Then, the value of K₂ can be given as
K₂ = √K₁
K₂ = √3.7037
K₂ = 1.924
Hence the value of the equilibrium constant for the final reaction ¹/₂ H₂ (g) + ¹/₂ F₂ ⇄ HF (g) is 1.924
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Perform the following operation
and express the answer in
scientific notation.
5.0×10−5 +2.0×10-4
[ ? ]×10
The answer in scientific notation for the following operation is 2.5 × 10⁻⁴
What is scientific notation?
It is a way of writing very large or very small numbers. A number is written in scientific notation when number between 1 and 10 is multiplied by power of 10.
To determine the power or exponent of 10,
we must follow the rule listed below:
The base should be always a 10The exponent must be non-zero integer that means it can be either a positive or negative Coefficients can be positive or negative numbers including whole and a decimal numbers5.0×10⁻⁵ + 2.0×10⁻⁴
= 5×10⁻⁵ + 2×10⁻⁴
= [tex]\frac{5}{10^{5} } + \frac{2}{10^{4} }[/tex]
= [tex]\frac{5}{100000} + \frac{2}{10000}[/tex]
= 0.00005 + 0.0002
= 0.00025
= [tex]\frac{2.5}{10000}[/tex]
= [tex]\frac{2.5}{10^{4} }[/tex]
= 2.5 × 10⁻⁴
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Particle X has 16 protons, 17 neutrons and 18 electrons. Particle X
an atom of a metal
an atom of a noble gas
an anion
a cation
Determine the total volume of all gases (at STP) formed when 50.0 mL of TNT (C3H5(NO3)3, d=1.60 g/mL, molar mass=227.10 g/mol reacts according to the following reaction
The total pressure would be 1189 atm.
What is pressure?
pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed .
Sol-the reaction is -
4C3H5(NO3)3--->6N2+O2+12CO2+10H2O
As we have the volume of TNT .we must know the density to find out the mass and then, apply molar mass to calculate mole.
TNT density = 1.654 g/mL
Density = mass / volume
1.654 g/mL = TNT mass / 50mL
1.654 g/mL . 50mL = TNT mass → 82.7 g
Mass / Molar mass = Mol → 82.7 g / 227.1 g/m = 0.364 mole
Now, we can calculate all the mole for the formed gases.
4 mole of TNT produce 6 mole N₂ ___ 1 mol O₂ __ 12 mole dioxide __ 10 mole of water
0.364 mole of TNT will produce:
- (0.364 . 6) /4 = 0.546 mole of produced nitrogen
- (0.364 . 1) /4 = 0.091 mole of produced oxygen
- (0.364 . 12) /4 = 1.092 mole of produced dioxide
0.364 . 10) /4 = 0.91 mole of produced vapour of water.
Total mole = 0.564 + 0.091 + 1.092 + 0.91 = 2.657 mole
Let's apply the Ideal Gases Law to find the total pressure, at STP
In STP, pressure is 1 atm for 1 mole at 273K, in a volume of 22.4 mL
But we have a volume of 50mL, and we have 2.657 total mole
Don't forget to convert 50 mL to L, cause the units for R
50 mL = 0.050L
P . 0.050L = 2.657 mol . 0.082L.atm/mol.K . 273K
P = (2.657 mol . 0.082L.atm/mol.K . 273K) / 0.050L
Thus
P=1189 atm
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A piece of barium has a volume of
4.00 cm3. The density of barium
is 3.62 g/cm3. What is the mass
of the sample of barium?
mass = [?] g
Record your answer to the hundredths place.
Mass (g)
Based on the volume and density of the barium sample, the mass
of the sample of barium mass 14.48 g.
What are the relationship between mass, volume, and density?The mass of a substance is the quantity of matter present in a substance.
The unit of mass is kg.
The volume of a substance is the amount of space covered by the substance. The unit for volume is a liter, cubic meter, or cubic centimeter.
The density of a substance is the ratio of the mass and volume of that substance.
Density = mass / volumeThe mass of the barium sample is calculated as follows:
The volume of the sample of barium = 4.00 cm³
The density of barium is 3.62 g/cm³
The mass of a substance = density * volumemass of the barium sample = 4.00 cm³ * 3.62 g/cm³
Mass of the barium sample = 14.48 g
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Determine the molecular/formula masses of the following compound. Round the masses of the element from the periodic table to the nearest tenth of a gram Th(SO4)2
The question requires us to determine the molecular mass of the compound thorium sulfate (Th(SO4)2), considering the atomic masses to the tenth of a gram.
The atomic masses of the elements present in the molecule given are:
Th: 232.0 u
S: 32.1 u
O: 16.0 u
To obtain the molecular mass of the compound, we must consider the number of atoms of each element: there are 8 oxygen (O) atoms, 2 sulfur (S) atoms and 1 thorium (Th) atom, therefore we calculate the mass as:
molecular mass Th(SO4)2 = (1 * 232.0) + (2 * 32.1) + (8 * 16.0) = 424.2 g/mol
Therefore, the molecular mass of Th(SO4)2 is 424.2 g/mol.