Question

I REALLY NEED HELP, PLEASE!!! DUE TONIGHT

Answer 1

Answer :

Part 1: The molar mass of $CuCO_3.Cu(OH)_2$ is 222 g/mol

Part 2: The mass of $H_2O$ and $CO_2$ is 18 g and 44 g respectively.

Explanation :

Part 1:

As we know that:

Atomic mass of copper, Cu = 64 g/mol

Atomic mass of carbon, C = 12 g/mol

Atomic mass of oxygen, O = 16 g/mol

Atomic mass of hydrogen, H = 1 g/mol

And we know that:

Molar mass of $CuCO_3.Cu(OH)_2$ = (2 × Atomic mass of Cu) + Atomic mass of C + (5 × Atomic mass of O) + (2 × Atomic mass of H)

Molar mass of $CuCO_3.Cu(OH)_2$ = (2 × 64) + 12 + (5 × 16) + (2 × 1)

Molar mass of $CuCO_3.Cu(OH)_2$ = 128 + 12 + 80 + 2

Molar mass of $CuCO_3.Cu(OH)_2$ = 222 g/mol

Part 2:

The balanced chemical reaction is:

$CuCO_3.Cu(OH)_2(s)\rightarrow 2CuO(s)+H_2O(g)+CO_2(g)$

From the balanced chemical reaction we conclude that:

1 mole of $CuCO_3.Cu(OH)_2$ reacts to give 1 mole of $H_2O$ and 1 mole of $CO_2$

Now we have to determine the mass of $H_2O$ and $CO_2$.

Mass of $H_2O$ = Moles of

Molar mas of $H_2O$ = 18 /mol

Mass of $H_2O$ = 1 mol × 18 g/mol = 18 g

And,

Mass of $CO_2$ = Moles of

Molar mas of $CO_2$ = 44 /mol

Mass of $CO_2$ = 1 mol × 44 g/mol = 44 g

Therefore, the mass of $H_2O$ and $CO_2$ is 18 g and 44 g respectively.