Question

(don’t need to answer all the questions i just need help with these!)

1) how many grams of iron are produced when 450. grams of iron (III) oxide react?

2) how many grams of water will be produced when 0.0155 moles of hydrogen gas completely react with Iron (III) oxide?

3) How many moles of mercury (II) oxide are needed to produce 12 grams of mercury?

4) How many moles of oxygen gas will be produced from 0.03 mol mercury (II) oxide?

5) How many moles of AlPO4 are produced when 0.27 of K3PO4 were used?

6) What is the mass of K3PO4 are needed to produce 2.04 moles of KNO3?

Answer 1

Step-by-step explanation:

1) Fe2O3 + 3 H2 -----> 2 Fe + 3 H2O Number of moles of Iron (III)oxide = 450 g / 159.69 g/mol = 2.82 mole

2) 0.0155 moles of hydrogen gas

3) oxide needed to produce 125 of oxygen is7.8 moles

4) 216.5894

5) K3PO4 and KNO3