Calculate the mass of 8.4*10^24 molecules of carbon dioxide?
Hint: first calculate the number of molecules
The txtbook says the answer is 6.1 x 10^2 g
But for some reason I m not getting the right answer.
Calculate the mass of carbon dioxide?
2017-11-07 9:50 am
回答 (1)
2017-11-07 9:57 am
✔ 最佳答案
Each mole of CO₂ contains 6.02 × 10²³ molecules.No. of moles of CO₂ = (8.4 × 10²⁴ molecules) / (6.02 × 10²³ molecules/mol) = 13.95 mol
Molar mass of CO₂ = (12.0 + 16.0×2) g/mol = 44.0 g/mol
Mass of CO₂ = (13.95 mol) × (44.0 g/mol) = 613.8 g ≈ 6.1 × 10² g (to 2 sig. fig.)
收錄日期: 2021-04-24 00:48:22
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