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8090 [49]
3 years ago
5

What is the molarity of a solution of 14.0 g NH4Br in enough H2O to make 150 mL of solution?

Chemistry
2 answers:
kiruha [24]3 years ago
8 0
The molarity of a solution equals to the mole number of the solute/the volume of the solution. For NH4Br, we know that the mole mass is 98. So the molarity is (14/98) mol /0.15 L=0.95 mol/L.
aniked [119]3 years ago
4 0

Explanation:

Molarity is defined as the number of moles per liter of solution.

Mathematically,         Molarity = \frac{no. of moles}{volume of solution in liter}

Since it is given that the molarity of a solution of 14.0 g and volume is 150 mL or 0.15 L.

Whereas number of moles = \frac{mass}{molar mass}

So, molar mass of NH_{4}Br is 97.94 g/mol.

Thus,      number of moles = \frac{14.0 g}{97.94 g/mol}

                                            = 0.142 mol

Therefore, calculate the molarity as follows.

              Molarity = \frac{no. of moles}{volume of solution in liter}  

                             = \frac{0.142 mole}{0.15 L}

                              = 0.946 mol/L

Hence, we can conclude that molarity of the solution is 0.946 mol/L.

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