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

Question

0.1488 g H₃PO₄ x (----) x (----) = ?

Answer 1

To answer this question you need to know that 1 mole=6.02 × 10 ²³ number of atoms/molecules (Avogadro's number)

1. First find the molar mass of H3PO4. H3PO4 molecular mass: 3 (H)+ (P)+4(O)= 3+31+64=98 g H3PO4 =1 mole
2. using molar mass number you can convert you grams of sample to moles of H3PO4
3. then, you can use the moles of sample to find out how many molecules you have Hint:use avogadros number to set up the conversion.
4. Last,you know that in each molecule of H3PO4 the ratio of number of H to one molecule of H3PO4 is 3:1.
5. Make sure you report your answer in 4 significant figure.

Good Luck !