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2 years ago

How many miles of NaCl are in 250 mL of a 0.4 M solution?

Chemistry

1 answer:

creativ13 [48]2 years ago

8 0

Answer:

There are 0.1 moles of solute in 250 mL of 0.4 M solution.

Explanation:

First, recognize that the molar concentration tells you how many moles of the solute are present in one liter of solution. In a 0.4 M solution, there are 0.4 moles of solute in every liter of solution. You can determine the number of moles of solute in 250 mL of the solution using dimensional analysis.

250 ml . 1L/1000 L . 0.4mol / 1L

Units of liters and milliliters cancel, leaving you with a final answer in units of moles, at 0.1 mol.

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Answer:

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Explanation:

Given parameters:

Mass of Pb(NO₃)₂ = 0.025g

Mass of water = 100g

Unknown:

Concentration of solution in ppm = ?

Solution:

Concentration in parts per million gives the amount of solute found in a million units of the solution. They are desirable for expressing very small amount of solutes in a large solution. For example, the level of arsenic in the soil.

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3 years ago

How many miles of NaCl are in 250 mL of a 0.4 M solution?​

How many miles of NaCl are in 250 mL of a 0.4 M solution?