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WorksheetsB 4.4 Molarity Quiz S25
Total questions: 10
Worksheet time: 41mins
Honor Pledge: I promise, on my honor, that I am taking this quiz while upholding all tenets of academic honesty.
yes
no (don't)
A mole of Oxygen gas (O2) contains
6.02 x 1023 _____.
moles
What is the molar mass of one molecule of methane, CH4?
16.0 g
10.0 g/mol
12.001 amu
48.0 g/mol
None of these options are correct.
How many moles of NaOH would be found in 60g of NaOH?
60 mol
1.5 mol
0.67 mol
240 mol
None of these options are correct.
Find the mass, in grams, of 5.5 moles of carbon dioxide (CO2).
5.5 grams
242 grams
121 grams
44.01 grams
None of these options are correct.
Calculate the molarity of the following solution:
2.2 mole of NaCl in 1.8 L of solution.
1.22 M
2.2 M
3.96 M
0.82 M
None of these options are correct.
What is the molarity of a solution that contains 128.6 g NaCl in 4.00 L of solution?
58.44 M NaCl
2.2 M NaCl
8.8 M NaCl
1,879 M NaCl
None of these options are correct.
How many moles are needed to make 3.0 L of a 2.5 M solution of KMnO4?
7.5 mol
1.2 mol
0.833 mol
0.047 mol
None of these options are correct.
How many grams of NaOH are required to prepare 0.75L of a 1.5M solution?
45 grams
80 grams
0.0125 grams
2 grams
None of these options are correct.
When making solutions in the lab, which of the following practices should you always do? (Choose all that apply.)
Use a weigh boat or paper when using an electronic balance to keep it clean.
Mix the solute into about 80% of the solvent at first.
Use the most accurate and precise tools available to measure liquid volumes.
Double-check your calculations before measuring out solute and solvent.
Label the prepared solution with name, concentration, date, and any hazard warnings.
