NBC 4 Molarity and Dilutions Calculations

How many moles of NaCl are present in a solution with a molarity of 8.59M and 125 mL of solution?

• 1.17 gram

• 62.7 mol
• 1.07 mol
• 62.7 grams

What is the molarity of 4 g of NaCl (MM=58.45) in 3,800 mL of solution?

• 0.018 M
• 0.0011 M
• 1.052 M
• 0.062 M

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
• 0.03 mol

Tags

NGSS.HS-PS1-7

How many moles are needed to make 2.5 L of a 3.8 M solution? 

• 9.5 mol
• 0.66 mol
• 1.5 mol
• 15 mol

0.25 L contains 0.4 mol NaOH. Find its molarity.

• 0.1M

• 1.6M

• 0.4M

• 0.625M

Tags

NGSS.HS-PS1-7

How many moles of NaCl are present in a solution with a molarity of 1.94 M and a volume of 375 mL?

• 1074 mol
• 0.069 mol
• 0.727 mol

• 62.7 mol

What volume, in milliliters, of 10.0 M NaOH is needed to prepare 300 mL of 2.00 M NaOH by dilution?

• 0.067 mL

• 60.0 mL

• 100 mL

• 125 mL

If I have 340 mL of a 0.5 M NaBr solution, what will the concentration be if I add 560 mL more water to it?

• .188 M

• 3.78 M

• .389 M

• 1.76 M

How many mL of 10.8M HCl are required to make 100.0 mL of 3.00M acid?

• 27.8 mL

• .278 mL

• 2.8 mL

• 278 mL

How much 1.50M KBr can be made from 15.6 mL of concentrated KBr with a molarity of 9.65 M?

(hint: use the dilution equation)

• 150. mL

• 151 mL

• 1.00 L

• 100. mL