Question

how many hydrogen atoms are in 0.1488 g of phosphoric acid, H3PO4?

Answer 1

Answer:

The answer to your question is:  2.75 x 10 ²¹ atoms

Explanation:

Data

H₃PO₄

mass = 0.1488 g

MW H₃PO₄ = 3 + 31 + (16 x 4) = 98g

                         98 g of H₃PO₄ ------------------  3 g of H₂

                         0.1488 g H₃PO₄ ---------------   x

                         x = 0.0046 g of H₂

                         1 g of H₂      ------------------- 6.023 x 10²³ atoms

                         0.0046 g of H₂ --------------   x

                         x = (0.0046 x 6.023 x 10²³) / 1

                         x = 2.75 x 10 ²¹ atoms