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aleksley [76]
3 years ago
5

PLZ HELP ASAP!!!

Chemistry
1 answer:
True [87]3 years ago
5 0

Answer:

342.3 g/mol for sugar, 58.44 g/mol of salt, and 84.007 g/mol for baking soda.

Explanation:

This is so because of the formula of molar mass: Molar mass is the mass of a given substance divided by the amount of that substance, measured in g/mol.

Hope this helps :)

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What is molarity of 47.0 g KCl dissolved in enough water to give 375 mL of solution?
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This question provides us –

  • Weight of \bf  KCl is = 47 g
  • Volume, V = 375 mL

__________________________________________

  • Molar Mass of \bf   KCl –

\qquad \twoheadrightarrow\bf  39.0983 \times 35.453

\qquad \twoheadrightarrow\bf 74.5513

<u>Using formula</u> –

\qquad \purple{\twoheadrightarrow\bf Molarity _{(Solution)} =  \dfrac{ W\times 1000}{MV}}

\qquad \twoheadrightarrow\bf Molarity _{(Solution)}  = \dfrac{ 47 \times 1000}{74.5513\times 375}

\qquad \twoheadrightarrow\bf Molarity _{(Solution)}  = \dfrac{47000}{27956.7375}

\qquad \twoheadrightarrow\bf Molarity _{(Solution)}  = \cancel{\dfrac{47000}{27956.7375}}

\qquad \twoheadrightarrow\bf Molarity _{(Solution)}  = 1.68117M

\qquad \pink{\twoheadrightarrow\bf Molarity _{(Solution)}  = 1.7M}

  • Henceforth, Molarity of the solution is = 1.7M

___________________________________________

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