Review Quiz on Mole Concept, Chemical Bonding, Volcanoes, Conste

Quiz
•
Science
•
9th Grade
•
Hard
Lorbeth Bano
Used 14+ times
FREE Resource
35 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What did ancient Chinese astronomers believe about the constellations? They ______________________.
were merely decorative patterns in the sky
had no effect on human life
were connected to the fate of the emperor and the state
changed positions every year
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In ancient Japan, what was the main purpose of studying constellations? To ________________________________.
create art and literature
develop new technologies
predict agricultural seasons and events
measure time accurately
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Determine the chemical formula of citric acid, if 12 grams of carbon react with 16 grams of hydrogen and 14 grams of oxygen.
C3H4O7
C2H18O7
C6H8O7
C12H8O14
Answer explanation
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The presence of SO2 in the atmosphere contributes to acid rain. What percentage of sulfur is present in SO2 (formula mass = 64.07 g/mol)? _____ %
40
96
60
50.05
Answer explanation
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
SCC community commonly use hydrogen peroxide (H2O2, molar mass = 34.02 g/mol) to clean their wounds. If CJ used 1 gram of H2O2 , how many moles of H2O2 did he use? _____ mole
0.035
0.030
0.029
0.025
Answer explanation
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many nitrogen gas molecules (N2) are found in an 8.5-mole sample?
5.12 x 1024
5.12 x 1023
4.14 x 1024
4.14 x 1024
Answer explanation
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What percentage of carbon is present in carbon dioxide (CO2)? ___ %
10
27
50
73
Answer explanation
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