chem Q3

👨🏻‍🏫 學術台化學

[匿名]

2008-10-19 8:32 am

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plz help me to ans above Qs,thz!!!!!!
p.s. do not miss any steps!!!!!

更新1:

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回答 (1)

Uncle Michael

2008-10-19 9:14 am

✔ 最佳答案

Molar mass of CaO = 40 + 16 = 56 g mol-1

CaCO3(s) → CaO(s) + CO2(g)

Mole ratio CaO : CO2 = 1 : 1

No. of moles of CaO = mass/(molar mass) = 11.76/56 = 0.21 mol

No. of moles of CO2 = 0.21 mol

Volume of CO2 = mol x (molar volume) = 0.21 x 24 = 5.04 dm3
=

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