3) How many moles are in 22 grams of argon? 4) How many grams are in 88.1 moles of magnesium? 5) How many moles are in 2.3 grams of phosphorus? 6) How many grams are in 11.9 moles of chromium? 7) How many moles are in 9.8 grams of calcium? 8) How many grams are in 238 moles of arsenic?

Question

3) How many moles are in 22 grams of argon? 4) How many grams are in 88.1 moles of magnesium? 5) How many moles are in 2.3 grams of phosphorus? 6) How many grams are in 11.9 moles of chromium? 7) How many moles are in 9.8 grams of calcium? 8) How many grams are in 238 moles of arsenic?

Answer 1

3) The molar mass of argon (Ar) is 39.95 g/mol. To find the number of moles in 22 grams of argon, we can use the formula:Number of moles = Mass (g) / Molar mass (g/mol)Number of moles = 22 g / 39.95 g/mol ≈ 0.55 molesTherefore, there are approximately 0.55 moles of argon in 22 grams.4) The molar mass of magnesium (Mg) is 24.31 g/mol. To find the number of grams in 88.1 moles of magnesium, we can use the formula:Mass (g) = Number of moles × Molar mass (g/mol)Mass (g) = 88.1 moles × 24.31 g/mol ≈ 2145.5 gTherefore, there are approximately 2145.5 grams of magnesium in 88.1 moles.5) The molar mass of phosphorus (P) is 30.97 g/mol. To find the number of moles in 2.3 grams of phosphorus, we can use the formula:Number of moles = Mass (g) / Molar mass (g/mol)Number of moles = 2.3 g / 30.97 g/mol ≈ 0.074 molesTherefore, there are approximately 0.074 moles of phosphorus in 2.3 grams.6) The molar mass of chromium (Cr) is 51.996 g/mol. To find the number of grams in 11.9 moles of chromium, we can use the formula:Mass (g) = Number of moles × Molar mass (g/mol)Mass (g) = 11.9 moles × 51.996 g/mol ≈ 617.4 gTherefore, there are approximately 617.4 grams of chromium in 11.9 moles.7) The molar mass of calcium (Ca) is 40.08 g/mol. To find the number of moles in 9.8 grams of calcium, we can use the formula:Number of moles = Mass (g) / Molar mass (g/mol)Number of moles = 9.8 g / 40.08 g/mol ≈ 0.245 molesTherefore, there are approximately 0.245 moles of calcium in 9.8 grams.8) The molar mass of arsenic (As) is 74.92 g/mol. To find the number of grams in 238 moles of arsenic, we can use the formula:Mass (g) = Number of moles × Molar mass (g/mol)Mass (g) = 238 moles × 74.92 g/mol ≈ 17800.6 gTherefore, there are approximately 17800.6 grams of arsenic in 238 moles.

Question

3) How many moles are in 22 grams of argon? 4) How many grams are in 88.1 moles of magnesium? 5) How many moles are in 2.3 grams of phosphorus? 6) How many grams are in 11.9 moles of chromium? 7) How many moles are in 9.8 grams of calcium? 8) How many grams are in 238 moles of arsenic?

Solution

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