What is the mass of 120 cm3 of carbon dioxide at S.T.P?
0.15 g
0.17 g
0.23 g
0.25 g
CO2 (1 mole)
22400 cm3 of CO2 at S.T.P weighs → 12 + (16×2)
= 44 g
∴ 120 cm3 of CO2 at STP weighs =4422,400×120
= 0.23 gms
What is the mass of 18.066 × 1023 molecules of carbon dioxide?
The molecular mass of carbon dioxide is 44 g. The volume of 132 g of carbon dioxide at STP is