.Which of the following elements would increase in size when it became an ion?
A Indium
B Lead
C Mercury
D Selenium

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.

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.

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The mass of the ammonia, given that the sample of the ammonia has a volume of 2.5 L is 3.965 g

First, we shall obtain the number of mole of the ammonia. Details below:

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 = 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

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The melting ice weighs 50.3 grams. When the ice and water mixture has come to a uniform temperature of 0 °C.

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

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Answer:

0-1

Explanation:

An electron is a negatively charged subatomic particle, So -1 is the correct option.

Answer:

what are the gas samples

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

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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.

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Answer:C

Explanation:I got it correct not no genius though.

The airbags that protect people in car crashes are inflated by the extremely rapid decomposition of sodium azide, which produces large volumes of nitrogen gas.

So the balanced chemical equation is:

NaN₃(s) → Na(s) + 1.5 N₂(g)

Since, pV=nRT

The mass of sodium azide = 79.3g

What is nitrogen gas?

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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.

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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.

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Empirical formula for your substance is C3H7. I'll demonstrate a different method for calculating the amount of carbon in moles.

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.

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.

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Answer:

Relative atomic mass of uranium = (238 x 0.50) + (235 x 0.20) + (234 x 0.30) = 236.3

The initial moles of the HI introduced is 6.2 moles.

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

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The statement that is correct about real machines is that work output is less then work input. So the correct option is A.

This is correct because in a real machine the production of work will never be greater than the input it has of work, since the machines themselves will lose energy in some way during the formation of the production of work. When losing energy, then, there will be less production and material than there was at the beginning of production.

This is quite the opposite in an ideal machine, where all the work that will be put in becomes the work output. It changes because in the ideal situation it does not take into account various variables that occur in reality that can cause energy to be lost in the process.

Therefore, we can confirm that the correct option is A. work output is less then work input.

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Which of the following is true of real machines?

A. work output is less then work input

B. work output equals work input

C. work input is decreased because of friction

D. work output is greater than work input

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.

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.

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Answer:

Thus, the second principal energy level can hold up to eight electrons, two in the s orbital and six in the p orbital. The third principal energy level has one s orbital, three p orbitals, and five d orbitals, which can each hold up to 10 electrons. This allows for a maximum of 18 electrons.

66.7 mL of Ethanol was dissolved in 222.2 mL of water. the volume % of the ethanol in the solution is 30.0 %.

Given that :

volume of the solute = 66.7 mL

volume of the solution = 222.2 mL

by using the volume % formula we can directly determine the volume % of ethanol, the percent by volume  expression is given as :

volume % = (volume of solute / volume of solution ) × 100 %

volume % = (66.7 / 222.2 ) × 100 %

volume % = 0.300  × 100 %

volume %  = 30 .0 %

( v / v ) % = 30.0 %

Thus, the percent by volume is 30.0 %.

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The noble gas family includes the element xenon, which has five different energy levels.

Any of a class of rare gases with high stability and very low reaction rates, such as helium, neon, argon, krypton, xenon, and occasionally radon. also known as inert gas. A collection of chemical elements known as the noble gases have a number of things in common. Under typical circumstances, they are all monatomic, tasteless, and colourless gases with low chemical reactivity. Helium, neon, argon, krypton, xenon, and radioactive radon are the six types of noble gases that are found in nature. Noble gases have entirely filled outer electron shells, are most frequently encountered as monatomic gases, and have no tendency to combine with other elements. As a result, they extremely infrequently form compounds with other elements. But it is conceivable to cause a noble gas to respond, just as one might force a nobleman to lose his honor.

Due to their filled valence shells (octets), which render them incredibly nonreactive, the noble gases (Group 18), which are found at the far right of the periodic table, were formerly known as the "inert gases." Compared to other element groupings, the noble gases were characterized at a relatively late stage.

The noble gases are employed to create inert atmospheres, usually for arc welding, to shield specimens and prevent chemical reactions. The substances are utilized in lasers as well as lamps like neon and krypton headlamps.

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The two changes that can be classified as physical are as follows:

A physical change in chemistry is a change affecting the form of a chemical substance, but not its chemical composition.

When matter changes its observable properties, we can say it has undergone a physical change.

Physical change is a type of change where the physical properties of matter change. Physical changes include;

Therefore, melting of ice, which is a change of state and shattering of glass are examples of physical change.

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Vessel B has more mass. Explanation: Because temperature and average kinetic energy of molecules are directly proportional to each other.

The average kinetic energy of a substance's particles is directly inversely correlated with its temperature. As the temperature increases, the particles must travel more quickly because their mass remains constant.

The relationship between a gas particle's average kinetic energy and temperature is linear. The pace at which the gas molecules flow rises with temperature. At a specific temperature, the average kinetic energy of all gases is identical.

Molecules of gas move more quickly when they are lighter. Because of this, as the gas's temperature rises, its volume also does so. The more gas particles there are, the more likely it is that they will hit the container's walls, hence the frequency of collisions must rise.

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6 co2 molecules required during the calvin cycle to make one molecule of glucose beacuse One carbohydrate molecule requires six rounds of the Calvin cycle to create since it contains six carbon atoms (one for each carbon dioxide molecule fixed).

What is calvin cycle?

The C3 cycle is another name for the Calvin cycle. The process by which the carbon from the carbon cycle gets fixed into sugars is a series of chemical processes. The chloroplast of the plant cell is where it takes place.

Because the main stable intermediate is the 3-carbon compound glyceraldehyde-3-phosphate, C3-type plants—so named because it is their most frequent set of carbon fixation reactions—are observed. The Calvin cycle, which best describes these reactions.

The processes of photosynthesis that utilise the energy accumulated by the light-dependent reactions to create glucose and other carbohydrates molecules are known as the Calvin cycle.

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The component in the solar cell system which provides electrons to replace the electrons released by the dye simply is the graphite layer.

The graphite layer is one of the major parts oth the solar cell. It help in the provision of electrons by acting as a counter electrode within the electrolyte. In order, this layer is part responsible for replacing electrons produced by dyes.

In conclusion, we can now confirm from all said and done from above that the solar cell too has a way of producing electrons.

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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.

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Given chemical reaction,

Glucose + Oxygen → carbon dioxide + water

Reactants : Glucose and oxygen.

Products : carbon dioxide and water.

Each chemical reaction is made up of three main components: the reactants (located on the left side of the reaction equation), the products (located on the right side of the reaction equation), and the particular reaction conditions, which are listed above or below the arrows in the middle of the reaction equation.

Combustion is one of the five fundamental types of chemical reactions, along with combination, decomposition, single-replacement, and double-replacement. You can classify a reaction into one of these groups by looking at the reactants and products of the reaction in question. It is possible for some reactions to fall into more than one category.

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6 moles of chlorine gas can be produced if 4 moles of fecl3 react with 4 moles of o2.

FeCl3+O2-->Fe2O3+Cl2  is not balanced.

We first need to balance the equation. The balanced equation:

4FeCl3 + 3O2 ==> 2Fe2O3 + 6Cl2

moles FeCl3 present =4 moles

moles O2 present = 4 moles

Since the mole ration in the balanced equation is 4 FeCl3 : 3 O2, the limiting reactant will be FeCl3.

So, moles Cl2 that can be produced = 4 moles FeCl3 x 6Cl2/4 moles                   FeCl3 = 6 moles Cl2.

What do you mean by Chlorine gas?

Chlorine gas is a greenish-yellow gas with a pungent odor that is highly toxic and corrosive. It is often used as a disinfectant and bleach in water treatment and swimming pools. Exposure to chlorine gas can cause severe irritation of the eyes, skin, and respiratory tract, and can even be fatal in large doses.

What are Moles?

Moles are a unit of measurement in chemistry used to measure the amount of a substance. The mole is defined as the amount of a substance that contains as many elementary entities (atoms, molecules, ions, etc.) as there are atoms in exactly 12 grams of carbon-12. The mole is a base unit in the International System of Units (SI) and has the symbol mol.

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Zinc fluoride is the term given to the mixture of the ions zinc (zn+2) and fluoride (f1).

Reactivity, by a reaction with the carbon dioxide in the air. Zinc emits zinc oxide fumes as it burns in the air, which produces a vivid bluish-green flame. With acids, alkalis, and other non-metals, zinc interacts easily.

Under normal circumstances, zinc and air quickly react, gradually generating a dull, grey zinc oxide covering. Zinc also combines to halogens, oxygen, chalcogens, alkalis, acids, ammonia and ammonium salts, as well as less reactive metals. Zinc is an amphoteric metal because it may react with the both acids and alkalis.

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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.

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.

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

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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?