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How many moles are present in 450 grams of sodium phosphide, [tex]Na_3P[/tex]?

A. 450 moles
B. 99.9 moles
C. 44,995 moles
D. 4.50 moles

Answer :

Answer:

4.5moles

Explanation:

Given parameters:

Mass of Na₃P = ?

Unknown:

Number of moles = ?

Solution;

The number of moles in a given substance can be derived from the expression below;

Number of moles = [tex]\frac{mass}{molar mass}[/tex]

Molar mass of Na₃P = 3(23) + 31 = 100g/mol

Number of moles = [tex]\frac{450}{100}[/tex] = 4.5moles

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Rewritten by : Barada

Final answer:

To find the number of moles in 450 grams of sodium phosphide (Na3P), divide the mass by the molar mass. The molar mass of Na3P is 99.96 grams/mole.

Explanation:

To find the number of moles in 450 grams of sodium phosphide (Na3P), we need to use the molar mass of Na3P. The molar mass of Na3P is equal to the sum of the molar masses of sodium (Na) and phosphorus (P). The molar mass of Na is approximately 22.99 grams/mole, and the molar mass of P is approximately 30.97 grams/mole.

So, the molar mass of Na3P is (3 * 22.99) + 30.97 = 99.96 grams/mole. To find the number of moles, we divide the mass given (450 grams) by the molar mass (99.96 grams/mole), giving us approximately 4.50 moles.