CHEMISTRY HIGH SCHOOL

how many moles of ammonium sulfate can be made from the reaction of 30.0 mol nh3 with h2so4 according to the following equation.

Answers

Answer 1

Answer:

15.0 moles of ammonium sulfate are formed by the reaction of 30.0 moles of ammonia with sulfuric acid.

Let's consider the reaction between ammonia and sulfuric acid to produce ammonium sulfate.

2 NH₃ + H₂SO₄ ⇒ (NH₄)₂SO₄

The molar ratio of NH₃ to (NH₄)₂SO₄ is 2:1. The moles of (NH₄)₂SO₄ produced from 30.0 moles of NH₃ are:

$30.0 mol NH_3 * (1mol(NH_4)_2SO_4)/(2molNH_3) = 15.0 mol(NH_4)_2SO_4$

15.0 moles of ammonium sulfate are formed by the reaction of 30.0 moles of ammonia with sulfuric acid.

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Answer 2

Answer: The answer is 15.0 mol ammonium sulfate. This is a stoichiometric problem. For the calculations, please refer to the attachment.

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Given the equation representing a system at equilibrium:N2(g) + 3H2(g)<==>2NH3(g) + energyWhich changes occur when the temperature of this system is decreased? (1) The concentration of H2(g) increases and the concentration of N2(g) increases. (2) The concentration of H2(g) decreases and the concentration of N2(g) increases. (3) The concentration of H2(g) decreases and the concentration of NH3(g) decreases. (4) The concentration of H2(g) decreases and the concentration of NH3(g) increases.

The nucleus of 8Be, which consists of four protons and four neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of two protons and two neutrons). True or false?

Answers

Answer: The given statement is false.

Explanation:

When there is more difference in the ratio or number of protons and neutrons then nucleus of the atom becomes unstable in nature. This unstability is caused due to greater repulsion between the like charges of sub-atomic particles.

As a result, this force of repulsion becomes greater than the binding energy. And, this force is known as the weak force because it is unable to bind the neutrons and protons together.

The proton and neutron ratio for smaller elements is 1:1 and for higher elements it has to be 1:5. Since, $^(8)Be$ is a smaller element with 4 protons and 4 neutrons. Hence, the proton and neutron ratio is 1:1.

Therefore, $^(8)Be$ is stable in nature.

Thus, we can conclude that the statement nucleus of 8Be, which consists of four protons and four neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of two protons and two neutrons), is false.

.During the combustion of methane (CH4), one mole of methane gas combines with two moles of oxygen gas (O2) to produce one mole of carbon dioxide gas (CO2) and two moles of water vapor. Which of the following chemical equations correctly represents the combustion of methane described above?

Answers

Answer:

22.4 L methane reacts with 44.8L of oxygen to give 44.8L of CO

2 and 22.4 L of water

Explanation:

From the balanced reaction: One mole(or 1 molecule or 16 g) of CH

reacts with 2 moles (or 2 molecules or 64 g) of oxygen to give one mole (or 1 molecule or 44 g) of CO

and 2 mole (or 2 molecules or 36 g) of water.

For the gaseous system at STP:

22.4 L methane reacts with 44.8 L of oxygen to give 22.4 L of CO

and 44.8 L of water.

and 2 mole (or 2 molecules or 36 g) of water.

For the gaseous system at STP:

22.4 L methane reacts with 44.8 L of oxygen to give 22.4 L of CO

and 44.8 L of water.

48dm3 of a gas has a mass of 262g how many moles is this? What is the Mr? What must this element be?

Answers

$n=(V)/(V_(0))\n\nV=48dm^(3)\nV_(0)=22.4(dm^(3))/(mol)\n\nn=(48dm^(3))/(22.4(dm^(3))/(mol))\approx2mol\n\nn=(m)/(M_(r)) \ \ \ \Rightarrow \ \ \ M_(r)=(m)/(n)\n\nm=262g\nn=2mol\n\nM_(r)=(262g)/(2mol)=131(g)/(mol)$

This element must be xenon.

Final answer:

The number of moles is 1.49 and the molar mass is 176.124 g/mol.

Explanation:

To determine the number of moles, we can use the formula:

moles = mass / molar mass

Given that the mass of the gas is 262g and the molar mass is 176.124 g/mol, we can substitute these values into the formula:

moles = 262g / 176.124 g/mol = 1.49 moles (rounded to two decimal places).

Therefore, the number of moles is 1.49. The molar mass of the compound is 176.124 g/mol. In order to determine what element this is, we would need more information about the compound.

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A lawnmower runs on gasoline.what type of energy transformation takes place in its engine?

Answers

It would be chemical energy?

Given the balanced equation:F2 energy → F F
Which statement describes what occurs during
this reaction?
(1) Energy is absorbed as a bond is formed.
(2) Energy is absorbed as a bond is broken.
(3) Energy is released as a bond is formed.
(4) Energy is released as a bond is broken.

Answers

Answer: The correct option is 2.

Explanation: We are given in the question that Fluorine molecule is dissociating into two Fluorine atoms. Equation for the following is given by:

$F_2+energy\rightarrow F+F$

In a chemical reaction if the energy is written at the reactant side, the energy is being absorbed and if the energy is written at the product side, the energy is being released.

From the given chemical equation, the energy is written at the reactant side, so the energy is being absorbed by the reactants in order to break the bond between $F_2$ molecule to form 2 individual Fluorine atoms.

Hence, the correct option is 2.

(2) Energy is absorbed as a bond is broken is the correct answer.

Where is the ion charge located in the isotope symbol?

Answers

The ion charge is located at the top right

Final answer:

In an isotope symbol, the ion charge is generally indicated at the top right corner, so if you have a calcium ion with a +2 charge, the symbol would be Ca²⁺.

Explanation:

In an isotope symbol, the ion charge is generally indicated at the top right corner. The isotope symbol typically includes the atomic number on the lower left, the atomic symbol in the middle, and the mass number on the upper left. If there is an ion charge, it will be indicated on the upper right of the symbol. Suppose you have an ion with a +2 charge, like a calcium ion, it's symbol would be Ca²⁺.

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