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WorksheetsMolarity and Mass Percent
Total questions: 25
Worksheet time: 25mins
What is the percent by mass of a solution made by dissolving 20.0 g of NaCl into 180.0 g of water?
10.0 %
11.1 %
80.0 %
20.0 %
What is the percent by mass of a solution made by dissolving 10.0 g of NaCl into 180.0 g of water?
5.26 %
5.56 %
180.0 %
20.0 %
What is the percent by mass of a solution containing 56.5 g of salt in 500 g of water?
11.3 %
5.56%
8.85%
10.2 %
What is the molarity of a 0.5L sample of a solution that contains 60.0 g of sodium hydroxide (NaOH)
0.8 M
1.5M
3.0M
6.0M
What is the molarity of a solution that contains 5 moles of solute in 2 liters of solution?
2.5 M
5 M
10 M
0.4 M
What is the definition of molarity?
The mass of a substance in grams
The number of particles in a substance
The number of moles of solute per liter of solution
The volume of solvent in liters
Which of the following is the correct formula for calculating molarity?
moles/liters of solution
moles/kg of solvent
# particles/Avogadro's #
theoretical yield/actual yield
If you have 0.045 L of 0.465 M potassium bromide. How many moles of potassium bromide are present?
20.9 mol
0.021 mol
0.02 mol
0.0209 mol
What is the molarity of 4 g of NaCl (molar mass =58.45) in 3,800 mL of solution?
0.018 M
0.0011 M
1.052 M
0.062 M
Find the molarity of 186.55 g of sucrose, C12H22O11 (molar mass = 342 ) in 250 mL of water.
2.18 M
0.746 M
1.18 M
0.545 M
How many mL of 10.8M HCl are required to make 100.0 mL of 3.00M acid?
27.8 mL
27.78 mL
2.8 mL
278 mL
What is the molarity of a solution made by adding 1.565 moles of PbNO3 to 500 mL?
300. M
31.3 M
3.13 M
1.56 M
What is the correct formula to solve for the Molarity of a solution that has .4 moles of HCl in 9.5 L of solution?
M = 9.5 L / .4 mol
M1V1=M2V2
M = .4 mol / 9.5 L
none of the other choices
Molarity is measured in
moles per kg
mols per L
moles per kJ
moles per mL
The ratio of the number of moles of solute to the volume of solution in liters
molarity
molality
percent composition
mole ratio
The ratio of the mass of an element to the mass of the compound, multiplied by 100
percent by mass
molarity
molality
mole ratio
The ratio of the mass of solute to the mass of solution, multiplied by 100
percent by mass
molarity
molality
mole ratio
What is the molarity of a solution containing 25 g of KCl (molar mass = 74.55 g/mol) in 500 mL of water?
0.67 M
0.50 M
0.33 M
0.25 M
Calculate the mass percent of a solution made by dissolving 15 g of glucose in 85 g of water.
15%
17.6%
12.5%
10%
If you have a 2.0 M solution of NaOH, how many moles of NaOH are present in 250 mL of this solution?
0.5 moles
1.0 moles
0.25 moles
0.75 moles
What is the mass percent of a solution containing 30 g of ethanol in 120 g of water?
20%
25%
30%
33%
How many grams of solute are needed to prepare 1 L of a 0.5 M solution of NaCl? (Molar mass of NaCl = 58.44 g/mol)
29.22 g
58.44 g
116.88 g
14.61 g
What is the molarity of a solution prepared by dissolving 10 moles of solute in 4 liters of solution?
2.5 M
4 M
10 M
2 M
A solution is made by dissolving 5 g of urea in 95 g of water. What is the mass percent of urea in the solution?
5%
10%
15%
20%
What is the molarity of a solution if 0.75 moles of solute are dissolved in 1.5 liters of solution?
0.5 M
1 M
1.5 M
2 M
