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8 December, 01:33

Calculate the molarity (M) of 4.62 grams of MgCl2 in 250 mL of solution

A) 2.0 M

B) 0.31 M

C) 0.194 M

D) 0.02 M

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Answers (1)
  1. 8 December, 04:46
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    Molarity is defined as the moles of solute divided by the liter of solution. In this case the moles of solute can be obtained by dividing 4.62 g of MgCl2 to its MW of 95.211 g/mol. The moles of MgCl2 obtained is then divided by the 0.250 L of the solution. The resulting molarity is then equal to 0.194 M.
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