Calculate the number of moles for each of the following substances:
1. 3.16 g of KMnO₄
2. 32.33 g of K₂CrO₄
3. 100 g of KHCO₃
Answer (2)
The number of moles: 3.16g of K M n O 4 1 mole of K M n O 4 - 158g. x moles of K M n O 4 - 3.16g. x = 158 g 1 m o l e ∗ 3.16 g = 158 3.16 = 0.02 m o l e
The number of moles: 32.33g of K 2 C r O 4 1 mole of K 2 C r O 4 - 194g. x moles of K 2 C r O 4 - 32.33g. x = 194 g 1 m o l e ∗ 32.33 g = 194 32.33 = 0.17 m o l e
The number of moles: 100g of KH C O 3 1 mole of KH C O 3 - 100.1g. x moles of KH C O 3 - 100g. x = 100.1 g 1 m o l e ∗ 100 g = 100.1 100 = 0.999 m o l e
Greetings, n00nst00p :)
The moles of 3.16 g of KMnO₄ is approximately 0.020 moles, 32.33 g of K₂CrO₄ is approximately 0.167 moles, and 100 g of KHCO₃ is approximately 0.999 moles. Each calculation follows the formula for moles based on mass and molar mass. The results show the respective amounts of moles for each compound calculated accurately.
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