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2 years ago

In a closed system, how will a decrease in pressure affect the following reaction: 2A(g) +2B(g) ⇌ 2C(g) + 2D(g)?

Chemistry

2 answers:

LekaFEV [45]2 years ago

6 0

Answer:

B. No change will occur.

Explanation:

Notice that the two moles of gas on the side of the reactants also reflects on the side of the products (i.e. there are also two moles of gas on the side of the products).

This translates to there won't be any change in the equilibrium if the pressure is increased.

The only important factor to take note of is that altering the pressure can only result in a significant change for equilibrium reactions between gases, when the reaction features a change in the number of moles of gas.

DochEvi [55]2 years ago

3 0

As number of gaseous moles in reactant and prodict are same that is 4

So No change will occur

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Using the following thermochemical equation, determine the amount of heat produced from the combustion of 24.3 g benzene (C6H6).

Anna007 [38]

Answer:

ΔH = -976.5 kJ

Explanation:

For the reaction given, there are 2 moles of benzene (C6H6). The heat of this reaction is -6278 kJ, which means that the combustion of 2 moles of benzene will lose 6278 kJ of heat. It is an exothermic reaction.

The value of ΔH, the enthalpy, is a way of measurement of the heat, and it depends on the quantity of the matter (number of moles).

So, 24.3 g of benzene has :

n = mass/ molar mass

n = 24.3/78.11

n = 0.311 moles

2 moles ------------ -6278 kJ

0.311 moles ----------- x

By a simple direct three rule:

2x = -1953.08

x = -976.5 kJ

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2 years ago

How many moles of O2 should be supplied to burn 1 mol of C3H8 (propane) molecules in a camping stove

Shkiper50 [21]

The combustion of any hydrocarbon yields water and carbon dioxide. We will now construct a balanced equation:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

Each mole of propane requires 5 moles of oxygen.

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2 years ago

4.1 kg of a plastic, used to make plastic bottles, has a carbon footprint of 6.0 kg of carbon dioxide.

Debora [2.8K]

Answer:

The carbon footprint of one plastic bottle of mass 23.5 g is 34.390 g.

Explanation:

The carbon footprint of one plastic bottle can be estimated by simple rule of three. That is:

$x = \frac{23.5\,g}{4100\,g}\times 6000\,g$

$x = 34.390\,g$

The carbon footprint of one plastic bottle of mass 23.5 g is 34.390 g.

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2 years ago

How do you find the molar mass for ba(NO3)2

Korvikt [17]

To find the molar mass of Ba(NO3)2, determine the molar masses of all the atoms that form it. The Molar mass for Barium nitrate is 261.337 g/mol.

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2 years ago

The button batteries in small devices like watches are commonly composed of silver-zinc or mercury-zinc batteries. The reaction

photoshop1234 [79]

Answer:

The mercury button battery line notation is:

Zn⁰| Zn²|| , HgO| Hg⁰||

Explanation:

Mercury batteries either use

pure mercury(II) oxide (HgO)—which is called mercuric oxide

or a mixture of HgO with manganese dioxide (MnO2) which is as the cathode.

Anode has two half reactions:

The first step is an electrochemical reaction step:

Zn + 4OH− → Zn(OH)4−2 + 2e−[3]

cathode has a half reaction :

HgO + H2O + 2e− → Hg + 2OH−[3]

+0.0977 V standard potential is of this reaction.

which is followed by a chemical reaction step:

Anode consists of oxidation:

Zn+2OH>ZnO+H2O+2e

which gives an overall anode half-reaction of:

Zn + 2OH− → ZnO + H2O + 2e−[3]

Therefore,

The overall reaction for the battery is:

Zn + HgO → ZnO + Hg

7 0

2 years ago