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1. The number of atoms in 2.0 mol of nitrogen gas, N2, is: a. 1.8 x 1024 b. 2.4 x 1023 c. 1.2 x 1024 d. 2.4 x 1024 e. 4.0 x 1023 2. The molar mass of a compound with the empirical formula CH₂O has a mass of approximately 90 g. What is the molecular formula of the compound? a. C4H₂O4 b. C₂H6O₂ c. C3H₂O6 d. CzH6O3 e. CHO

1. The number of atoms in 2.0 mol of nitrogen gas, N2, is: a. 1.8 x 1024 b. 2.4 x 1023 c. 1.2 x 1024 d. 2.4 x 1024 e. 4.0 x 1023 2. The molar mass of a compound with the empirical formula CH₂O has a mass of approximately 90 g. What is the molecular formula of the compound? a. C4H₂O4 b. C₂H6O₂ c. C3H₂O6 d. CzH6O3 e. CHO

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1. The number of atoms in 2.0 mol of nitrogen gas, N2, is: a. 1.8 x 1024 b. 2.4 x 1025 c. 1.2 x 1024 d. 2.4 x 1024 e. 4.0 x 1023 2. The molar mass of a compound with the empirical formula CH₂O has a mass of approximately 90 g. What is the molecular formula of the compound? a. C4H₂O4 b. C₂H6O₂ c. C₂H₂O6 d. CzH6O3 €. CHO 3. A sample of hexane, C6H₁4, contains 3.0 x 1023 molecules of hexane. How many atoms are in the sample? a. 36 x 1024 b. 1.8 x 1023 c. 3.6 x 1024 d. 6.0 x 1024 e. 3.0 x 1023 4. Examine the following formulas. Which formula is an empirical formula? a. C₂H4 b. CsHo C. CH₂ d. C₂H₂ e. H₂O₂ 5. What is the molar mass of ammonium sulfite? a. 116.12g/mol b. 68.17g/mol c. 50.12g/mol d. 132.17g/mol
Transcribed Image Text:1. The number of atoms in 2.0 mol of nitrogen gas, N2, is: a. 1.8 x 1024 b. 2.4 x 1025 c. 1.2 x 1024 d. 2.4 x 1024 e. 4.0 x 1023 2. The molar mass of a compound with the empirical formula CH₂O has a mass of approximately 90 g. What is the molecular formula of the compound? a. C4H₂O4 b. C₂H6O₂ c. C₂H₂O6 d. CzH6O3 €. CHO 3. A sample of hexane, C6H₁4, contains 3.0 x 1023 molecules of hexane. How many atoms are in the sample? a. 36 x 1024 b. 1.8 x 1023 c. 3.6 x 1024 d. 6.0 x 1024 e. 3.0 x 1023 4. Examine the following formulas. Which formula is an empirical formula? a. C₂H4 b. CsHo C. CH₂ d. C₂H₂ e. H₂O₂ 5. What is the molar mass of ammonium sulfite? a. 116.12g/mol b. 68.17g/mol c. 50.12g/mol d. 132.17g/mol
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