Question

Determine the number of moles of 0.1488 g of phosphoric acid, H₃PO₄.

a) 0.001 moles
b) 0.002 moles
c) 0.003 moles
d) 0.004 moles

Answer 1

To determine the number of moles of phosphoric acid from a given mass, divide the mass by the molar mass.

Step-by-step explanation:

To determine the number of moles of phosphoric acid (H3PO4) from the given mass of 0.1488 g, we need to use the molar mass of phosphoric acid. The molar mass of H3PO4 is 98.0 g/mol. We can use the formula:

Number of moles = Mass / Molar mass

Number of moles = 0.1488 g / 98.0 g/mol = 0.00151 moles

Therefore, the correct answer is 0.001 moles (a).