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1.nitric acid reacts with potassium carbonate according to the following reaction
2(HNO3) + k2CO3 ----> 2(KNO3) + H2O + CO2
if nitric acid is reacted with 50.0 g of potassium carbonate, find the mass of water produced
2. manganese is added to steel to increase strength and resistance to wear. A 2.35 g sample of manganese steel is examined for composition and yields manganese in the form of manganese sulphate. if there is 0.322 g of manganese sulphate, calculate the percentage of manganese in the steel sample
3. a compound was found to contain 62.5% Pb, 8.5% N and 29.0% O. calculate its empirical formula.
4. If epsom salt MgSO4.zH2O is heated to 250 degrees celsius all of the water of hydration is lost. After heating a 2.04 g sample of the hydrate, 0.989 g of anhydrous MgSO4 remains. How many molecules of water are there per formula unit of MgSO4?
please show your working out thanks
2(HNO3) + k2CO3 ----> 2(KNO3) + H2O + CO2
if nitric acid is reacted with 50.0 g of potassium carbonate, find the mass of water produced
2. manganese is added to steel to increase strength and resistance to wear. A 2.35 g sample of manganese steel is examined for composition and yields manganese in the form of manganese sulphate. if there is 0.322 g of manganese sulphate, calculate the percentage of manganese in the steel sample
3. a compound was found to contain 62.5% Pb, 8.5% N and 29.0% O. calculate its empirical formula.
4. If epsom salt MgSO4.zH2O is heated to 250 degrees celsius all of the water of hydration is lost. After heating a 2.04 g sample of the hydrate, 0.989 g of anhydrous MgSO4 remains. How many molecules of water are there per formula unit of MgSO4?
please show your working out thanks