christinewilliams 2 years ago What is the formula mass of FeO3?

1. christinewilliams

can you show me how to do it with all your work make sure it is the correct unit labels please! thank you

2. NotTim

What's a formula mass?

3. Tttaammmaannnaa

55.847 (mass of Fe) + 3(15.999) (mass of 3 oxygen's) = 103.844 g

4. christinewilliams

wait thats the formula of it?

5. Tttaammmaannnaa

that is how you find the formula mass.

6. christinewilliams

im confused now

7. Tttaammmaannnaa

there is one Iron, Fe, and 3 Oxygen, O. So you add the Fe, 55.847 + 3*15.999, which is the mass of oxygen. the mass of oxygen is 15.999 but since there are 3 of them you have to multiply 3 and 15.999 and add that to 55.847 to get the total mass which is 103.844 g.

8. abb0t

To find the mass of the formula, you look at the periodic table Fe = ______ g O = 3( ______)g you mutiply by three b/ there are 3 oxygens. You then proceed to add evrything to get the mass.

9. NotTim

Do it steps @Tttaammmaannnaa

10. christinewilliams

so the mass os 103.844 right?

11. Tttaammmaannnaa

Since there is one Iron, Fe. the mass is 55.487. The mass of 3 oxygen's is 47.997. Add 55.487 and 47.997 and you get 103.844

12. Tttaammmaannnaa

the mass of Fe is 55.847. sorry

13. christinewilliams

14. Tttaammmaannnaa

yes

15. christinewilliams

ok thank you so much that helped a lot thank you again!