Quiz: Avogadro's Law

1. Avogadro's number is
a. 6.23 × 10–2
b. 6.02 × 1023
c. 6.23 × 102
2. At constant temperature and pressure, the volume of a gas is directly proportional to the
a. pressure of the gas
b. number of moles of the gas
c. square root of the mass of the gas
3. At constant temperature and pressure, the coefficients for gaseous species in a balanced chemical reaction can be interpreted as
a. grams
b. pressure
c. volumes
4. Avogadro's law holds true
a. some of the time
b. only when the gas is helium
c. for all gases
5. What must be held constant when applying Avogadro's law?
a. pressure and temperature
b. volume and temperature
c. moles and temperature
6. What quantity of neon would be equivalent to 6.02 × 1023 atoms of Ne?
a. 10.0 g
b. 1.00 mole
c. impossible to determine
7. A 1.00 mole sample of gas occupies a volume of 400.00 mL. If the amount of gas is increased to 2.50 moles at the same temperature and pressure, what will the new volume be?
a. 1.60 × 102 mL
b. 1.00 × 103 mL
c. 6.25 × 10–4 mL
8. What is the mass in grams of 10.00 atoms of hydrogen (H)?
a. 1.008 g
b. 5.972 × 1024 g
c. 1.674 × 10–23 g
9. A sample of argon, Ar, contains 5.97 moles of argon atoms. How many grams of argon are present? (The average atomic mass of argon is 39.95 g/mole.)
a. 39.95 g
b. 6.69 g
c. 239g

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