WorksheetsC1 3.5 Conservation of Mass
Total questions: 24
Worksheet time: 30mins
Name
Class
Date
1.
Measure of the amount of matter
a)
mass
b)
volume
c)
weight
d)
density
2.
Smallest unit of an element
a)
compound
b)
atom
c)
molecule
d)
product
3.
Smallest unit of a compound
a)
atom
b)
density
c)
element
d)
molecule
4.
Substance that cannot be broken into simpler substances
a)
element
b)
molecule
c)
gram
d)
proton
5.
Substance made up of chemically combined elements
a)
atom
b)
element
c)
electron
d)
compound
6.
Number written below & to the right of a chemical symbol
a)
subscript
b)
reactant
c)
product
d)
coefficient
7.
Substances that form as the result of a chemical reaction
a)
products
b)
reactants
c)
coefficients
d)
subscripts
8.
Substances present at the start of a chemical reaction
a)
subscripts
b)
coefficients
c)
reactants
d)
products
9.
How many iron atoms are in
Fe(NO3)2
Fe(NO3)2
a)
1
b)
2
c)
3
d)
6
10.
How many nitrogen atoms are in
Fe(NO3)2
Fe(NO3)2
a)
1
b)
2
c)
3
d)
6
11.
How many oxygen atoms are in
Fe(NO3)2
Fe(NO3)2
a)
1
b)
2
c)
3
d)
6
12.
4 grams of hydrogen and 32 grams of oxygen will combine to form:
a)
36 grams of water
b)
28 grams of hydroxide
c)
32 grams of oxygen
d)
36 grams of deuterium
13.
In a chemical reaction, 4 grams of sodium must combine with how many grams of chlorine to produce 10 grams of table salt?
a)
4 grams
b)
6 grams
c)
8 grams
d)
10 grams
14.
A 500-gram block of solid cheese is melted in a pot. Which is most likely the mass of the cheese after it is melted?
a)
500 grams, because the cheese does not gain or lose mass just because it was melted
b)
499 grams, because some of the cheese evaporates as it melts
c)
502 grams, because the cheese absorbs heat as it melts
15.
A student notices that an inflated balloon gets larger when it is warmed by a lamp. Which best describes the mass of the balloon as a result of this change?
a)
The mass of the balloon increases because the size of the balloon has increased.
b)
The mass of the balloon increases because the temperature of the balloon has increased.
c)
The mass of the balloon stays the same because the gas inside the balloon still has the same mass after it warms up.
16.
Jamie weighs a glass of water and observes its weight to be 12 ounces. Jamie then adds 6 ice cubes to the glass of water. Each ice cube weighs one ounce. After all of the ice cubes have melted, what will be theapproximate weight of the glass of water?
a)
6
b)
12
c)
18 ounces
17.
A 55-gram egg is placed in a pot. After the egg is boiled, which is most likely the mass of the egg?
a)
50
b)
55
18.
In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B have?
a)
4g
b)
5g
c)
9g
d)
14g
19.
If reaction starts with 20g of reactants it should produce
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
20.
If a reaction starts with a total 75g of reactants it should produce
a)
a total of 40g of products
b)
a total of 75g of products
c)
a total of 180 g of products
d)
None of the above
21.
In the reaction AB-----> A + B reactant AB has 12g and product B has 5g. How many grams should product A have?
a)
17g
b)
2g
c)
7g
d)
None of the above
22.
12g of Carbon react with 16g of Oxygen, how much carbon monoxide (CO) is formed?
a)
28 g
b)
4g
c)
30g
d)
12g
23.
24 g of magnesium reacts with 38 g of fluorine to produce _____ g magnesium fluoride
a)
62
b)
38
c)
24
d)
14
24.
32 g of Oxygen completely reacts with 8 g of Hydrogen to produce _____ g Water
a)
8
b)
12
c)
24
d)
40
100 %
