
mole concept
Quiz
•
Chemistry
•
9th Grade
•
Hard
Standards-aligned
Uma Angadi
Used 1+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student needs 65.0 g of copper(II) chloride for an experiment. How many atoms of copper is this?
2.91 x 10^23 atoms
3.91 x 10^25 atoms
2.35 x 10^23 atoms
4.70 x 10^23 atoms
Tags
NGSS.HS-PS1-7
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If one Monster energy drink contains 0.16 g of caffeine, how many moles of caffeine do we consume when we drink 1 can? The chemical formula for caffeine is C8H10N4O2.
194.19 moles
1.07 moles
0.00082 moles
1213.69 moles
Tags
NGSS.HS-PS1-7
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mylanta, a common antacid, contains magnesium hydroxide, Mg(OH)2. How many moles of magnesium hydroxide are in 75.0 g of magnesium hydroxide?
0.551 moles
0.778 moles
1.29 moles
1.82 moles
Tags
NGSS.HS-PS1-7
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Acetone, C3H6O, is the main component of fingernail polish remover. What is the molar mass of acetone to the nearest hundredths place?
29.018 g/mol
34.058 g/mol
58.1 g/mol
58.08 g/mol
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following compounds is correctly matched with its empirical formula?
Dihydrogen dioxide - H2O2
Hydrogen dioxide - H2O
Tetrahydrogen dioxide - H4O2
Dihydrogen dioxide - HO
Tags
NGSS.MS-PS1-1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chalk is mostly made of calcium carbonate, CaCO3. If it took 48.6 g of chalk to write your name on the sidewalk, how many moles of calcium carbonate does your name contain?
0.486 mol
0.714 mol
1.40 mol
2.06 mol
Tags
NGSS.HS-PS1-7
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A scientists analyzed an unknown sample and determined that it contained 5 moles of oxygen and 2 moles of nitrogen? Which of the following would be its molecular formula?
N2O5
N4O
NO
O2N5
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