Worksheets5.01 Day 2 Additional Practice
Total questions: 16
Worksheet time: 14mins
Name
Class
Date
1.
Can matter be created or destroyed?
a)
Yes, it can be created.
b)
Yes, it can be destroyed.
c)
No, matter is always conserved
d)
None of these
2.
The total amount of matter (atoms) before and after a chemical reaction (change), remains the same.
a)
True
b)
False
3.
What is the law of conservation of mass?
a)
Matter changes when reacted or changed.
b)
The mass of all reactants are changed during a physical or chemical change
c)
The mass of the reactants is the same as the mass of the products
d)
The mass of the products is different than the mass of the reactants.
4.
What will weigh more when a chemical change is complete? The reactants before the chemical reaction, or the product after the reaction is complete?
a)
They both will weigh the same
b)
The product always weighs more than the reactant
c)
The reactant will weigh more than the product
d)
They both will loose mass after the reaction
5.
All chemical equations create or destroy matter, which is why scientists weigh their reactants so they can see how much was created or destroyed
a)
True
b)
False
6.
10 g of a solid chemical reacts with a 10 g of a liquid chemical, the reaction bubbles and changes the color of the liquid. The colored liquid weighs 13 g, what can be concluded?
a)
The gas produced from the bubbles weighed 5 g
b)
The bubbles were evidence of 7 g of matter being destroyed
c)
The gas produced weighed 7 g
d)
The gas produced weighed 13 g
7.
Since gasses weigh nothing, when they are produced in a reaction they do not have to be accounted for.
a)
True
b)
False
8.
If four hydrogen atoms react with two hydrogen atoms, how many atoms will be in the product?
a)
6
b)
4
c)
8
d)
2
9.
The principle of conservation of mass is true for
a)
Physical Changes
b)
Chemical Changes
c)
Neither
d)
Both
10.
The principle of conservation of mass is true for
a)
Only reactions in an open system
b)
Only reactions in a closed system
c)
For reactions in both an open and closed system
d)
No reactions
11.
What does the principle of conservation of mass mean?
a)
The total mass of the reactants is more than the products
b)
Matter is not created or destroyed
c)
The total mass of the reactants is less than the products
12.
Can matter be created or destroyed?
a)
Yes, it can be created.
b)
Yes, it can be destroyed.
c)
No, matter is always conserved
d)
None of these
13.
The total amount of matter (atoms) before and after a chemical reaction (change), remains the same.
a)
True
b)
False
14.
What is a reactant in a chemical equation?
a)
The input which reacts chemically to create product
b)
the output, or result of a chemical reaction
c)
a small molecule that makes up one part of a polymer
d)
compounds made of thousands of repeating smaller molecules
15.
Fill in the blank:
It is best to observe the law of conservation of mass in a _____________________ because it will ensure that the mass is the same in the beginning and end of a chemical reaction.
It is best to observe the law of conservation of mass in a _____________________ because it will ensure that the mass is the same in the beginning and end of a chemical reaction.
a)
closed
b)
open
c)
balanced
d)
rearranged
16.
In a closed system, a chemical reaction takes place. The mass of the reactants in the beginning of the reaction is 25g. What does the mass have to be in the end of the reaction in order to follow the law of conservation of mass?
a)
25g
b)
You can't tell with the given information.
c)
30g
d)
15g
100 %
