What is the molar mass of sodium phosphate, Na₃PO₄?

Question

Quizplus · Accepted Answer

To calculate the molar mass of sodium phosphate, we need to add up the atomic masses of all the elements in the compound.

Na: 1 x 22.99 = 22.99
P: 1 x 30.97 = 30.97
O: 4 x 16.00 = 64.00
S: 1 x 32.06 = 32.06

Total: 22.99 + 30.97 + 64.00 + 32.06 = 149.02 g/mol

However, the compound has two sodium (Na) atoms and two sulfate (SO4) ions. So, we need to multiply the total by a factor of 2.

2 x 149.02 = 298.04 g/mol

Therefore, the molar mass of sodium phosphate is 298.04 g/mol, which is the closest to answer choice C (164.0 g). The other answer choices are too far off, indicating a calculation error.

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What Is the Molar Mass of Sodium Phosphate, Na₃PO₄