How many grams of potassium are in 27.8 g of K₂CrO₇? A)4.49 g B)1.422 g C)8.98 g D)78.2 g E)55.6 g

Name: How many grams of potassium are in 27.8 g of K 2 CrO 7 ? A)4.49 g B)1.422 g C)8.98 g D)78.2 g E)55.6 g
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Quizplus · Accepted Answer

The molar mass of K2CrO7 is approximately 294.2 g/mol. Potassium (K) has a molar mass of about 39.1 g/mol, and there are 2 moles of K in K2CrO7. Therefore, the mass of potassium in 27.8 g of K2CrO7 is calculated as follows: (2 * 39.1 g/mol) / 294.2 g/mol * 27.8 g ≈ 8.98 g.

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