Free Printable Chemistry Midterm 2018

Worksheets

Chemistry Midterm 2018

Total questions: 19

Worksheet time: 30mins

Name

Class

Date

What is the limiting reactant if 10 moles of NH₃ react with 30.0 moles of NO?
4NH₃+6NO --> 5N₂ + 6H₂O

NH₃

N₂

water

P₄+ 3O₂--> P₄O₆
What is the limiting reactant is 12 moles of P₄react with 15 moles of O₂?

P₄

O₂

P₄O₆

none of the above

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

theoretical yield

mole ratio

actual yield

percentage yield

4NH₃+ 5O₂--> 4NO + 6H₂O
How many grams of NO are formed if 6.30g of ammonia react with 1.80g of oxygen?

0.37g

0.045g

1.35g

11.1g

When reacting Na with Cl₂, we calculated that the theoretical yield should be 12.5 grams. Our actual yield was 13.0 grams. What is the percent yield?

100%

104%

96%

1.04

You have a gas that has a pressure of 2 atm and a volume of 10L. What would be the new volume if the pressure was changed to 1 ATM?

5 L

20 L

It would stay at 10L

1 L

When 0.250 moles of a gas is placed in a container at 25 °C, it exerts a pressure of 700 mm Hg. What is the volume of the container?

0.557 Liters

6.57 Liters

8.74 Liters

0.0087 Liters

When doing gas law calculations it is important to use the which units for pressure, volume and temperature?

atm, L, K

atm, ml, C

mmHg, L, K

mmHg, ml, K

A gas is heated from 263K to 298K. The volume is increased from 24.0L to 35.0L. If the original pressure was 1.00 atm, what is the new pressure?

0.78 atm

1.65 atm

1.28 atm

0.61 atm

10.

A weather balloon has a volume of 105L at 0.97 atm when the temperature is 318K. What is the volume at 293K and 1.05 atm?

89.4 L

0.32 L

93.8 L

3.13 L

11.

If the pressure exerted by a gas at 25 degrees C in a volume of 0.044 L is 3.81 atm, how many moles of gas are present?

.002766 mole

.0069 mol

2.766 mol

9.887 mol

12.

Calculate the volume that a 0.323 mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.

7.18 L

7.81 L

4.63 L

4.36 L

13.

If the pressure of a given sample of gas is increased, the volume will

Increase

Decrease

Remain the same

14.

When pressure increases, volume will ...

stay the same

increase

decrease

15.

If a balloon is cooled what will happen to the volume?

Volume will increase

Volume will decrease

Volume will not change

16.

A gas at 78°C occupies a volume of 345 ml. Calculate the volume at 45K assuming that the pressure is held constant.

.44 L

45 mL

.40 mL

.42 L

17.

Collisions between gas particles are said to be "elastic" because _________________________.

they have a stretchy waistband

kinetic energy is lost between particles

kinetic energy is not lost between particles and is instead transferred

particles move in a straight line

18.

Which graph shows the relationship between temperature and pressure?

19.

If the temperature of a gas is increased the pressure will

increase

decrease

Reset

Chemistry Midterm 2018

Total questions: 19

Worksheet time: 30mins

Similar Resources on Wayground