Conservation of Mass in Reactions

Conservation of Mass in Reactions

Assessment

Interactive Video

Chemistry, Science

7th - 10th Grade

Hard

Created by

Mia Campbell

FREE Resource

The video tutorial explains the concept of conservation of mass, emphasizing that the mass of reactants equals the mass of products in a chemical reaction. It provides examples and calculations to illustrate this principle, including practice problems for students. The tutorial also includes demonstrations to show how mass is conserved in different chemical reactions, highlighting the importance of state symbols and the role of gases in mass changes. The video concludes with additional resources for further learning.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the conservation of mass principle state about the mass of reactants and products?

The mass of reactants and products are unrelated.

The mass of reactants equals the mass of products.

The mass of reactants is always less than the mass of products.

The mass of reactants is always greater than the mass of products.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a chemical reaction, if you start with 150 grams of reactants, how much product should you expect?

150 grams

100 grams

200 grams

50 grams

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If 28 grams of nitrogen reacts with 64 grams of oxygen, what is the total mass of nitrogen dioxide produced?

28 grams

64 grams

92 grams

36 grams

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the reaction of ethane with oxygen, if 28 grams of ethane produces 88 grams of carbon dioxide and 36 grams of water, how much oxygen was used?

64 grams

28 grams

124 grams

96 grams

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the missing mass of oxygen if 4 grams of a reactant and 36 grams of product are involved?

36 grams

28 grams

40 grams

32 grams

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a reaction where 48 grams of reactants produce 36 grams of water, how much carbon dioxide is formed?

48 grams

36 grams

24 grams

12 grams

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the mass in the first demonstration involving calcium carbonate and hydrochloric acid?

The mass decreases.

The mass increases.

The mass fluctuates.

The mass remains the same.

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