Question

I need a tutor for my chemistry homework I can’t understand

Answer 1

1) Write the chemical equation

$N_2+3H_2\rightarrow2NH_3$

2) Convert grams of H2 into moles of H2.

$\text{mol H}_2=7gH_2\cdot\frac{1molH_2}{2.016gH_2}=3.472molH_2$

3) Moles of N2 needed to react with H2

$\text{mol N}_2=3.472molH_2\cdot\frac{1molN_2}{3molH_2}=1.157molN_2$

4) Plug values in the frame

1.157 mol N2 is needed in the reaction.