WorksheetsChemistry Exam Review
Total questions: 14
Worksheet time: 25mins
Which one is not a property
Mass
Density
Melting Point
Solubility
Jay had two clear liquids in bottles. The mass of one liquid was 10.2 grams and the other was 7.6 grams. When he mixed them, a yellow solid formed and settled to the bottom of the bottle. He predicted that the liquid plus the solid would have more mass, so he put the bottle on a scale. The mass was 17.8 grams. Why did the mass not change?
A chemical reaction occurred, which means the atoms rearranged to form new substances
A chemical reaction occurred, which means even though the old atoms turned into new atoms, they had the same mass
Jay must have made an error in measuring the mass before or after he mixed the liquids
One of his classmates probably did something to affect his experiment
A student dissolves 5 gram of salt in 12 grams of water. She then determines the mass of the solution. What is the mass of the dissolved salt and water?
5 grams
7 grams
17 grams
It is not possible to tell from the data
What is the volume of this box if the measurements were 2.1cm by 4.1 cm by 2.1 cm?
8.3 cm3
18.08 cm3
-0.1
54.09cm3
What is the density of the fish if its mass is 8 grams?
8 g/cm3
8.1g/cm3
.08g/cm3
0.8 g/cm3
What is the difference between a physical and chemical change?
Physical just changes what it looks like chemical changes how the atoms bond
Physical and chemical changes are the same
Physical is the action of what you do and chemical is what you see the stuff doing
Physical and chemical changes are not related to each other
Balance this equation
6P + O2 -------> 3P2O5
P4 + O2 ------> 2P2O5
2P + 2O2 ------> P2O5
4P + 5O2 ------> 2P2O5
Which change will produce a new substance
making coffee
making cookies
making boiling water for tea
making snowflakes from paper
Your teacher gave you two beakers with a red liquid substance. She asks you to determine if they are same or different. What could you do to determine if they are the same or different?
Test the boiling points
Test the smell
Test the hardness
Test the solubility
Does this picture represent a chemical reaction? Why or Why not.
Yes, because they are just different pictures
No, because it does not show how you made them react
Yes, because it show that the reactants paired up with different things on the product side
No, because the picture is not a balanced equation.
What does a claim do?
Answers the question to the lab
Answers a question using a complete sentence
Answers the question and provides data to support the statement
Answers the question and gives personal opinion to the topic
What could be used as reasoning?
Scientific principles
Personal opinion
The data collected
Observations from the experiment
Which one is good evidence to use in a CER?
The mass of the gummy bear changed from 3.0 grams to 4.0 grams overnight
The gummy bear got bigger and changed color when in the sugar solution overnight
The density of the gummy bear changed from 2.0 g/cm3 to 2.6 g/cm3 when it sat in the sugar solution overnight.
The volume of the gummy bear changed from 1.3 cm3 to 2.1 cm3 overnight
The volume of a sponge is 125.4 cm3 and the density was 0.08g/cm3 what is its mass?
1567 grams
10.03 grams
125.4 grams
30.09 grams
