How many milliliters of a 1.90 M NaBr solution contain 78.0 g of NaBr? Express y

Question

How many milliliters of a 1.90 M NaBr solution contain 78.0 g of NaBr? Express your answer with the appropriate units.

2)How many milliliters of a 1.71 M LiCl solution contain 15.7 g of LiCl? Express your answer with the appropriate units.

3)3.00 L of a 1.50 M NaOH solution Express your answer with the appropriate units.

4)5.00 L of a 0.150 M KCl solution Express your answer with the appropriate units.

5)30.0 mL of a 8.00 M HCl solution Express your answer with the appropriate units.

6)175 mL of a 2.60 M NaNO3 solution Express your answer using three significant figures.

Explanation / Answer

question 1 )

answer : we have

molarity of NaBr = 1.90 M = 1.90 mole/L

and

mass of NaBr = 78.0 g

and

moles of NaBr = mass / molar mass = 78.0 g / 102.894 g/mol = 0.758 mole

and

molarity = moles / volume in liter

or

volume = moles / molairty = 0.758 mole / 1.90 mole/L = 0.39898 L = 398.98 ml

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