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Butoxors [25]
3 years ago
7

Worth 100 points plus ill mark brainliest

Chemistry
1 answer:
nalin [4]3 years ago
7 0

Answer:

4.92 grams of sodium phosphate (Na₃PO₄) are required to make 125 milliliters of a 0.240 M.

Explanation:

Molarity is a measure of concentration that indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:

Molarity=\frac{number of moles}{volume}

Molarity is expressed in units \frac{moles}{liter}.

In this case:

  • Molarity= 0.240 M
  • number of moles= ?
  • volume= 125 mL= 0.125 L

Replacing in the definition of molarity:

0.240 M=\frac{number of moles}{0.125 L}

Solving:

number of moles= 0.240 M*0.125 L

number of moles= 0.03 moles

Being the molar mass of sodium phosphate 164 g/mole, that is, the mass of one mole of the compound, you can calculate the mass of 0.03 moles using the following rule of three: if 1 mole of the compound has 164 grams, 0.03 moles contains how much mass?

mass=\frac{0.03 moles*164 grams}{1 mole}

mass= 4.92 grams

<u><em>4.92 grams of sodium phosphate (Na₃PO₄) are required to make 125 milliliters of a 0.240 M.</em></u>

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