Question

How much lime is obtained by burning $400g$ of lime stone?

• A. $224g$
• B. $220g$
• C. $400g$
• D. $320g$

Answer 1

The correct option is A $224g$

We have,

$CaC{O}_3\to CaO+C{O}_2$

From the above reaction 1 mole of lime stone is producing 1 mole of lime.

molar mass of lime stone = 100g/mol

given mass of lime stone = 400g

so, moles of lime stone = $\frac{givenmass}{molarmass}=\frac{400}{100}=4$

so, moles of lime produced = 4 moles

molar mass of lime(CaO) = 56g/mol

of massof lime produced = $moles\times molarmass=56\times 4=224g$