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11 Nov 2019
Id Date: Name: 1. What is the mass of 6 atom(s) of copper in grams? A) 381.3 g B) 1.58 x 101 g C) 6.38Ã10-24g D) 6.022 x 10 g E) 6.33 x 10-2g A sample of ammonia has a mass of 73.5 g. How many molecules are in this sample? A) 4.31 molecules B) 4.43Ã1025 molecules C) 1.40Ã1023 molecules D) 2.60 x 104 molecules E) 1.46Ã10-s molecules 2. 3. What is the molar mass of ethanol (CHsOH)? A) 45.06 g/mol B) 34.06 g/mol C) 46.07 g/mol D) 30.03 g/mol E) 105.03 g/mol How many grams of potassium are in 11.7 g of K CrO,? A) 1.89g B) 0.598 g C) 3.78 g D) 78.2 g E) 23.4 g 4. 5. The mineral vanadinite has the formula Pbs(VOJhCl. What mass percent of chlorine does it contain? A) 7.51% B) 3.08% C) 9.91% D) 2.50% E) 1.13%
Id Date: Name: 1. What is the mass of 6 atom(s) of copper in grams? A) 381.3 g B) 1.58 x 101 g C) 6.38Ã10-24g D) 6.022 x 10 g E) 6.33 x 10-2g A sample of ammonia has a mass of 73.5 g. How many molecules are in this sample? A) 4.31 molecules B) 4.43Ã1025 molecules C) 1.40Ã1023 molecules D) 2.60 x 104 molecules E) 1.46Ã10-s molecules 2. 3. What is the molar mass of ethanol (CHsOH)? A) 45.06 g/mol B) 34.06 g/mol C) 46.07 g/mol D) 30.03 g/mol E) 105.03 g/mol How many grams of potassium are in 11.7 g of K CrO,? A) 1.89g B) 0.598 g C) 3.78 g D) 78.2 g E) 23.4 g 4. 5. The mineral vanadinite has the formula Pbs(VOJhCl. What mass percent of chlorine does it contain? A) 7.51% B) 3.08% C) 9.91% D) 2.50% E) 1.13%
Lelia LubowitzLv2
14 May 2019