1) If 33.7 moles of MgCl₂ is dissolved to make 8.3L of solution, what is the molarity of the solution? Answer: [MgCl₂] = 4.1 M
2) If 275.2g of KMnO₄ is dissolved in to make 0.500 L of solution, what is the molar concentration of the solution? Answer: [KMnO₄] = 3.48 M
3) 205 L of carbon dioxide gas at STP is compressed and then dissolved in 10.0 L of water. What is the molar concentration of the resulting solution? Answer: [CO₂] = 0.915 M
Please help with these questions on Molar Concentration!?
2020-11-24 2:26 pm
回答 (1)
2020-11-24 3:52 pm
✔ 最佳答案
1)Molarity = (33.7 mol) / (8.3 L) = 4.1 M
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2)
Molar mass of KMnO₄ = (39.1 + 54.9 + 16.0×4) g/mol = 158.0 g/mol
Molar concentration = (275.2/158.0 mol) / (0.500 L) = 3.48 M
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3)
Molar volume of CO₂ at STP = 22.4 L/mol
Molar concentration = (205/22.4 mol) / (10.0 L) = 0.915 M
收錄日期: 2021-04-24 09:51:32
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