Is lead a mixture or pure substance? and is Paint a mixture or pure substance?

Chemistry

1 answer:

Paul [167]3 years ago

6 0

Lead is a pure substance
paint is a mixture substance

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. Given the reaction 2HgO → 2Hg + O2 , how many moles of elemental mercury will be obtained by the decomposition of 1 mole of Hg

AveGali [126]

Answer:

one mole of HgO will give one mole of Hg.

Explanation:

Given data:

Moles of HgO = 1 mol

Moles of Hg = ?

Solution:

Chemical equation:

2HgO → 2Hg + O₂

Now we will compare the moles of Hg with HgO from balance chemical equation.

HgO : Hg

2 : 2

1 : 2/2×1 = 1 mol

So, one mole of HgO will give one mole of Hg.

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2 years ago

Which of the following would shift the following equilibrium system to the right? C2H2(g) + H2O(g) ⇌ CH3CHO(g) Removing H2O(g) f

Fittoniya [83]

Answer:

Adding H₂O(g) to the system.

Explanation:

Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.

1) Removing H₂O(g) from the system:

This will decrease the concentration of the reactants side, so the reaction will be shifted to the left side to suppress the removal of H₂O(g) from the system.

2) Adding CH₃CHO(g) to the system :

This will increase the concentration of the products side, so the reaction will be shifted to the left side to suppress the adding CH₃CHO(g) to the system.

3) Removing C₂H₂(g) from the system:

This will decrease the concentration of the reactants side, so the reaction will be shifted to the left side to suppress the removal of C₂H₂(g) from the system.

4) Adding H₂O(g) to the system:

This will increase the concentration of the reactants side, so the reaction will be shifted to the right side to suppress the addition of H₂O(g) to the system.
So, it is the right choice.

3 0

3 years ago

Read 2 more answers

How many energy levels does an atom of beryllium have?

MissTica

Answer:

In Beryllium there are two energy levels

Explanation:

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2 years ago

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