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molar volume

Total questions: 14

Worksheet time: 21mins

Name
Class
Date
1.

Standard temperature and pressure (STP) mean

a)

A temperature of 0°C and a pressure of 101.3 kPa, or 1 atmosphere (atm).

b)

A temperature of 100°C and a pressure of 101.3 kPa, or 1 atmosphere (atm).

c)

A temperature of 0°K and a pressure of 10 atmosphere (atm).

2.

At STP, 1 mol, or representative particles, of any gas occupies a volume of......................

a)

24.4 dm3

b)

44.2 dm3

c)

22.4 dm3

3.

The quantity, 22.4 L, is called the ........................ of a gas.

a)

molar volume

b)

molar mass

c)

Atomic volume

4.

Different gases have different densities

a)

True

b)

False

5.
What are the values for STP?
a)
0 K and 1 atm
b)
0oC and 1 atm
c)
760 K and 1 atm
d)
273oC and 1 atm
6.
A 2.00 L sample of pure oxygen gas (O2) is measured at STP.  How many moles of oxygen is this?
a)
24.4 mol
b)
0.007 mol
c)
1.44 mol
d)
0.09 mol
7.
What is the volume of 0.881 mole of a gas at standard temperature and pressure?
a)
0.0401 L
b)
19.7 L
c)
22.4 L
d)
39.4 L
8.
A balloon expands as it fills with air. Which statement explains what happens to the internal pressure?
a)
The observed pressure is decreasing as the collisions of gas molecules increase.
b)
The observed pressure is increasing as the collisions of gas molecules increase.
c)
The observed pressure is decreasing as the collisions of gas molecules decrease.
d)
The observed pressure is increasing as the collisions of gas molecules decrease.
9.

What is the molar mass of C2H4O2?

a)

40 g/mol

b)

50 g/mol

c)

60 g/mol

d)

68 g/mol

10.

The number 6.02 x 1023 is called...

a)

Obama's number and it measures the amount of gases or liters in a mole

b)

Bohr's number and it measures the amount of molecules or atoms in a sample

c)

Avogadro's number and it measures the amount of gas in moles

d)

Avogadro's number and it measures the amount of molecules or atoms in a sample

11.
If a balloon is cooled what will happen to the volume?
a)
Volume will increase
b)
Volume will decrease
c)
Volume will not change
d)
Balloon freezes to death
12.

How many moles of aluminium ions are in 0.30 moles aluminium oxide?

a)

0.23

b)

0.60

c)

0.54

d)

0.41

13.

How many moles are there in 2g helium?

a)

0.5

b)

1

c)

0.25

d)

0.75

14.

What is the volume of 1 mol of CO2 gas at STP?

a)

24 L

b)

22.4L

c)

1.5 L

d)

1 meter cube