Question

Calculate number of moles in 440mg of Co2

Answer 1

Molar mass of CO2 = 12+32 = 44 g/mol
given mass = 440 mg = 440 × 10-³ g
no. of moles = given mass/molar mass
= 440×10-³ / 44
= 10×10-³
= 10-²

Answer 2

44 grams is one mole of CO2, so 440/44 is 10 so 10 moles of CO2