How many grams of na2so4 should be weighed out to prepare 0.5l of a 0.100m solution

Explanation:

The symbol M in 0.100 M means molarity.

Molarity is the unit of concentration that indicates the number of moles of solute in 1 liter of solution:

You have 0.5 liters of the solution, so you have:

Now to convert moles of Na₂SO₄ to mass in grams you use the molar mass of Na₂SO₄:

Rounded to 1 significant figure: 7 g.

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