cuo + h₂ → cu + h₂o\nhow many moles of h₂o are produced when 240 g of cuo react?\na 18 moles\nb 54 moles\nc…

Answer:

C. 3 moles

Explanation:

Step1: Calculate molar - mass of CuO

The molar mass of Cu (copper) is approximately 64 g/mol and of O (oxygen) is 16 g/mol. So, the molar mass of CuO, $M_{CuO}=64 + 16=80$ g/mol.

Step2: Calculate moles of CuO

The number of moles of CuO, $n_{CuO}=\frac{m}{M}$, where $m = 240$ g and $M = 80$ g/mol. So, $n_{CuO}=\frac{240}{80}=3$ mol.

Step3: Determine mole - ratio

From the balanced chemical equation $CuO + H_2\rightarrow Cu + H_2O$, the mole - ratio of CuO to $H_2O$ is 1:1.

Step4: Calculate moles of $H_2O$

Since the mole - ratio of CuO to $H_2O$ is 1:1, the number of moles of $H_2O$ produced is equal to the number of moles of CuO reacted. So, $n_{H_2O}=n_{CuO}=3$ mol.