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8.1.6 Review
Test Description: Utah 8.1.6 Law of Conservation of Mass
Instructions: Answer all questions to get your test result.
1) When you burn a log what happens to the matter?
A
The matter turns into nothing
B
The matter disappears forever when it burns
C
The amount of matter increases
D
The matter turns into different types of matter, but the amount stays the same
2) A student mixes 100g of baking soda and 20g of vinager. What is the total resulting mass?
A
less than 120g
B
240g
C
120g
D
more than 120g
3) How many Hs in H2O.
A
1
B
4
C
2
D
6
4) The reactants is:
A
The ingredients
B
The products
C
What is made
5) How many molecules are in 4CO
A
3
B
4
C
2
D
1
6) A + B --) C I you start with 3 and 5 of reactants A and B and they react to make product C. How many grams of product is there going to be?
A
There is no way to know
B
Less than 8 grams
C
Exactly 8 grams
D
More than 8 grams
7) Are the reactants before or after the arrow in a chemical equation?
A
After
B
Before
8) Are the products before or after the arrow in a chemical equation?
A
After
B
Before
9) What are the products?
A
what is left behind
B
What is made in a chemical reaction
C
The ingrediants to a chemical reaction
10) What is the Law of conservation of mass?
A
The mass of the reactants does not equal the mass of the products
B
The mass of the reactans equal the sum of the reactants and the products.
C
The mass of the reactants equals the mass of the products.
*select an answer for all questions
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