Question

Can someone please help me with this

Answer 1

First balance the equation: you get 3Fe + 4H2O = Fe3O4 +4H2O

Then set up the equations according to the spidey map below.

x 10^25 molec. H2O/ 1 x x x

Multiply the top all together, then divide by the whole bottom half.

Answer: 154.4 g H2

136 g Fe /1 x $\frac{1molFe}{55.85 g Fe}$ x $\frac{1molFe3O4}{3molFe}$ x $\frac{6.02(10x^{23}) molec. Fe3O4 }{1molFe3O4}$

Multiply the top all together, then divide by the whole bottom half.

Answer: 4.95 x 10^20 Formula units (fu) Fe3O4

8.25 x 10^23 molec. Fe/ 1 x $\frac{1molFe}{6.02(10^{23})molec.Fe}$ x $\frac{4molH2}{3molFe}$

Multiply the top all together, then divide by the whole bottom half.

Answer: 1.83 mol H2