Author Question: Phosphoric acid can be prepared by reaction of sulfuric acid with phosphate rock according to the ... (Read 228 times)

jenna1 · **on:** Mar 21, 2021

Question 1

Phosphoric acid can be prepared by reaction of sulfuric acid with “phosphate rock” according to the equation:

Ca₃(PO₄)₂ + 3H₂SO₄→ 3CaSO₄ + 2H₃PO₄

How many oxygen atoms are there in 7.00 ng of Ca₃(PO₄)₂?

◦ 1.36 × 10¹³
◦ 5.44 × 10¹³
◦ 3.37 × 10¹⁶
◦ 1.09 × 10²³
◦ 1.09 × 10¹⁴

Question 2

Phosphoric acid can be prepared by reaction of sulfuric acid with “phosphate rock” according to the equation:

Ca₃(PO₄)₂ + 3H₂SO₄→ 3CaSO₄ + 2H₃PO₄

What is the molar mass of Ca₃(PO₄)₂?

◦ 310.18 g/mol
◦ 87.05 g/mol
◦ 278.18 g/mol
◦ 215.21 g/mol
◦ 166.02 g/mol

joshraies · **Reply #1 on:** Mar 21, 2021

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