Question

What is the mass of 4.39 mol Na?

Answer 1

Answer:

101 g Na

Explanation:

To convert between moles and grams, you have to use the molar mass of the substance. The molar mass of sodium is 22.99 g/mol. You use this as the unit converter.

$4.39molNa*\frac{22.99gNa}{1molNa} = 100.9261gNa$

Round the number to the lowest number of significant figures; 101 g Na.

Answer 2

The mass of 4.39 moles of sodium (Na) is 100.97grams.

HOW TO CALCULATE MASS:

• The mass of a substance can be calculated by multiplying the number of moles in the substance by its molar mass. That is;

Mass = no. of moles × molar mass

• According to this question, there are 4.39 moles of Na. The molar mass of Na is 23g/mol.

Mass of Na = 4.39 × 23

Mass of Na = 100.97grams.

Therefore, mass of 4.39 moles of sodium (Na) is 100.97grams.

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