1. Which of the following has an empirical formula that is different than its mo

Question

1. Which of the following has an empirical formula that is different than its molecular formula? A) C5H7O3 B) C3H6N3 C) CH2S D) C2H7N3

2. What is the mass in kilograms of a 250 mL flask that weighs 105 grams?

A) 1.05 kg
B) 1050 kg
C) 0.105 kg
D) 10.5 kg

3. Ethanol has a density that is about 0.8g/mL whereas water has a density of 1.00 g/mL. This means that a certain volume of ethanol will __________.

A) weigh less than an equal volume of water
B) weigh exactly the same as an equal volume of water
C) weigh more than an equal volume of water
D) One cannot decide.

Explanation / Answer

1) B

2) C

3 A

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