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?

a) the particles of the chair are strongly held together.