# Moles And Molarity: Question Preview (ID: 3277)

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**What is the molar mass of CuFeS2?**

a) 152 g

b) 184 g

c) 3.07 X 10^24 g

d) 1.108 X 10^26 g

**How many moles of CH4 are in 1.2 x 10^26 molecules?**

a) 7.224 x 10^49 moles

b) 7.5 x 10^24 moles

c) 1.99 moles

d) 199.34 moles

**What was the molarity of a solution containing 4.5 moles of NaCl in 100 ml?**

a) 45 M

b) 0.078 M

c) 0.045 M

d) 0.776 M

**How many grams of NiCl2 are in 2.56 moles?**

a) 99g

b) 0.026 g

c) 253.44 g

d) 1.54 x 10^24 g

**How many grams of KCO3 are needed to make a 22.4 M solution within 3.6 L?**

a) 0.81 grams

b) 80.64 moles

c) 99 g

d) 7983.36 g

**How many ml of solution are needed to make a 5.78 M solution with 2.98 moles of CaO?**

a) 520 ml

b) 0.52 ml

c) 0.0532 ml

d) 53.2 ml

**How many grams are needed to make 8.3 moles of C12H22O11?**

a) 41.20 grams

b) 4.997x10^24 grams

c) 2838.6 grams

d) 1.38 x 10^-23 grams

**How many formula units are in 9.6 moles NH4CO3?**

a) 0.12 formula units

b) 5.78 x 10^24 formula units

c) 748.8 formula units

d) 1.59 x 10^-23 formula units

**How many moles of Al2Cl3 are needed to creat a 6.7 M solution using 400ml of water?**

a) 426.12 grams

b) 0.0168 moles

c) 2680 moles

d) 2.68 moles

**You have 35.2 g of barium hydroxide Ba(OH)2. How many moles is that?**

a) 0.21 mol

b) 6019.2 mol

c) 2.119 x 10^25 mol

d) 5.847 x 10^-23 mol

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