- Calculate the number of molecules in 80g of NaOH.
- Calculate the molarity of a solution obtained by dissolving 80g of NaOH 1.5 L of water.
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2017-12-11 2:27 pm
回答 (1)
2017-12-11 2:49 pm
- Calculate the number of molecules in 80g of NaOH.
Molar mass of NaOH = (23 + 16 + 1) g/mol = 40 g/mol
Number of moles of NaOH = (80 g) / (40 g/mol) = 2 mol
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- Calculate the molarity of a solution obtained by dissolving 80g of NaOH 1.5 L of water.
Number of moles NaOH = 2 mol
Molarity of the solution = (2 mol) / (1.5 L) = 1.3 M
Molar mass of NaOH = (23 + 16 + 1) g/mol = 40 g/mol
Number of moles of NaOH = (80 g) / (40 g/mol) = 2 mol
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- Calculate the molarity of a solution obtained by dissolving 80g of NaOH 1.5 L of water.
Number of moles NaOH = 2 mol
Molarity of the solution = (2 mol) / (1.5 L) = 1.3 M
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