Chemistry Help... N2 + 3 H2 produces 2 NH3

Question

_{How many moles of ammonia are produced when 2.5 moles of hydrogen (H2) react?}

_{How many moles of nitrogen (N2) are needed to react when 2.5 moles of hydrogen react?}

_{How many grams of ammonia are produced when 6.0 grams of nitrogen react?}

_{How many grams of ammonia are produced when 6.0 grams of hydrogen react?}

Answer 1

this is a simple scaling problem. If 3 moles of H₂ produce 2moles NH_3. We can write that as a ratio 2/3 but since we only have 2.5 moles H₂ we need to find how many create the same ratio 2/3=x/2.5. if we multiply both sides by 2.5 we find x= 5/3 . So this would mean that we would get 5/3 moles NH₃ when we used 2.5moles H₂.

For the second problem you need to compare the moles of N₂ used to moles of H₂ used --> so again we have 2/3=x/2.5.

The last two problems require that you convert grams into moles before finding the ratios that you need to solve and back to grams once you have found the moles....