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3241004551 [841]
3 years ago
7

If 120 g of NaOH is dissolved in 2.5 L of water, what is the molarity of the solution?

Chemistry
1 answer:
klio [65]3 years ago
8 0

Answer:

1.2 M.

Explanation:

<em>Molarity is the no. of moles of solute in a 1.0 L of the solution.</em>

M = n/V.

<em>M = (mass/molar mass)solute x (1000/V of the solution).</em>

mass of NaOH = 120.0 g.

molar mass of NaOH = 40.0 g/mol.

V of the solution = 2.5 L = 2500.0 mL.

<em>∴ M = (mass/molar mass)solute x (1000/V of the solution)</em> = (120.0 g / 40.0 g/mol) x (1000 / 2500.0 mL) = <em>1.2 M.</em>

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1) O - 88.10/16,      H - 11.190/1

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Empirical formula - CH4N2O

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