Question

calculate the mass of
a. 2.5 moles of carbon dioxide
b. 4 moles of HNO3
c. 7.5 moles of water​

Answer 1

a) 2.5 moles of CO2.

molar mass of CO2 is 44 grams per mole.

So, 2.5*44 grams= 110 grams will be the mass of 2.5 moles of CO2.

b) molar mass of HNO3 = 1+14+3*16 = 63 grams per mole.

So, 4 moles of HNO3 will have a mass of 4*63 = 252 grams

c) molar mass of H2O= 2+16=> 18 grams per mole.

So, 7.5 moles of H2O will have a mass of 7.5*18 => 135 grams.