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Sig Figs
Molarity
Molar Mass
Mole Conversions
100

When adding and subtracting, the fewest  _________ should be used for rounding the final answer.

Decimal Places

100

What is the equation for Molarity?

Molarity = Moles of Solute / Liters of Solution

100

What is the molar mass of Helium (He)?

4.003 g/mol

100

How many moles are in 95 g of KCl?


1.3 Moles

200

Provided the final answer to the correct precision according to our sig fig rules.

54.00 ft + 3.5 ft =

57.5 ft

200

Determine the Molarity of a solution containing 1.50 moles of CaCl2 in 3.00L of solution.

0.500M

200

True or False: 1 mole of Helium has the same number of atoms as 1 mole of Nitrogen.

True

200

How many grams are in 1.5 moles of AgCl?


210 g

300

When multiplying and dividing, the fewest  _________ should be used for rounding the final answer.

Significant Figures

300

Determine the molarity of a solution containing 0.250 moles of calcium chloride in 750 mL of solution.

0.333M

300

True or False: 1 mole of potassium (K) has a different mass than 1 mole of copper (Cu).

True

300

How many grams are in 2.35 moles of Mg(NO3)2?

Hint: Solve this first!!! Molar Mass of Mg(NO3)2 = _______  g/mol

349 g

400

Provided the final answer to the correct precision according to our sig fig rules.

4.00 cm x 5 cm=

20cm2

400

How many moles of NaC2H3O2 would be needed to make 1.5L of a 0.5M solution?

0.75 moles

400

Calculate the molar mass of (NH4)2CO3.

96.094 g/mol

400

How many moles are in 128 g of sodium chloride?


2.19 moles

500

Provided the final answer to the correct precision according to our sig fig rules.

3.4 x 1032 kg ÷ 1.6 x 1045 m3=

2.1 x 10-13 kg/m3

500

You are trying to prepare a 2.0M solution of KNO3 with 202.2g of the compound available. What volume of the solution will you be able to make?

2.0 L

500

Calculate the molar mass of Magnesium Oxide.

40.31 g/mol

500

How many total atoms are in 45.67g of Sucrose (C12H22O11)?

3.614 x 1024 atoms

600

Provided the final answer to the correct precision according to our sig fig rules.

12.5 moles x 122.10 g/moles =

1530 g

600

What mass of Calcium Chloride is needed to make  250.0 mL of a 1.0 M solution?

28g

600

6.02 x 1023 atoms of calcium would have what mass?

40.08 g

600

How many total atoms are in 12g of Aluminum Hydroxide?

6.5 x 1023