Can anyone please help me to work this out

Emily Sampson

Calcium oxide, CaO, is a base compound which can react with acids such as nitric acid, HNO3. A student mixed 1.5g of CaO with 2.5M HNO3. The (unbalanced) chemical equation for this reaction is shown below:

CaO + HNO3 → Ca(NO3)2 + H2O

[P8] How many moles of CaO were reacted?