8)
What mass of hydrogen is needed to react with 32 g of copper oxide?
CuO + H2 → Cu + H2O

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questions and answers1)what mass of hydrogen is needed to react with 32 g of copper oxide?cuo + h2 ? cu + h2o2)what mass of hydrogen is produced when 195 mg of potassium is added towater?2 k + 2 h2o ? 2 koh + h23)what mass of magnesium oxide is formed when 6 g of magnesium reacts withoxygen?2 mg + o2 ? 2 mgo4)the pollutant sulphur dioxide can removed from the air by reaction

Question: 1)What Mass Of Hydrogen Is Needed To React With 32 G Of Copper Oxide?CuO + H2 ? Cu + H2O2)What Mass Of Hydrogen Is Produced When 195 Mg Of Potassium Is Added Towater?2 K + 2 H2O ? 2 KOH + H23)What Mass Of Magnesium Oxide Is Formed When 6 G Of Magnesium Reacts Withoxygen?2 Mg + O2 ? 2 MgO4)The Pollutant Sulphur Dioxide Can Removed From The Air By Reaction

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1)What mass of hydrogen is needed to react with 32 g of copper oxide?

CuO + H2 ? Cu + H2O

2)What mass of hydrogen is produced when 195 mg of potassium is added to

water?

2 K + 2 H2O ? 2 KOH + H2

3)What mass of magnesium oxide is formed when 6 g of magnesium reacts with

oxygen?

2 Mg + O2 ? 2 MgO

4)The pollutant sulphur dioxide can removed from the air by reaction with

calcium carbonate in the presence of oxygen. What mass of calcium

carbonate is needed to remove 1 tonne of sulphur dioxide?

2 CaCO3 + 2 SO2 + O2 ? 2 CaSO4 + 2 CO2

5)5.00 g of a mixture of MgSO4.7H2O and CuSO4.5H2O was heated at 120°C

until a mixture of the anhydrous salts was formed, which weighed 3.00 g.

Calculate the percentage by mass of MgSO4.7H2O in the mixture?

the answer is 75.0%.