If 132g of carbon dioxide gas were produced how many grams of CaCOs must How man

Question

If 132g of carbon dioxide gas were produced how many grams of CaCOs must How many moles of NaCI are produced when 0.5 moles of Na:CO0, react with excess hydrochloric acid in the acid-base double displacement reaction according to the following equation? NazCO (s) + 2HCl(aq) 2NaCl(aq)+ H COg) If 8.6 g of Na COs has been neutralised how many grams of NaCI must have been produced How many moles of Pb(NOal2 must have reacted with excess KI if 1.5 moles of Pbla were produced in the double displacement reaction according to the following equation? If 6g of Pblz was produced how many grams of Pb/NOsla must have reacted? How many moles of FeS are formed when 10 moles of Fe react with excess sulfur in the synthesis reaction according to the following equation? aFe(s) Se(s)-8FeS(s) If 4480 g of Fe has reacted how many grams of Fes must have been produced? How many moles of COz must have reacted with excess H20 if 0.01 moles of Cetfi20s were produced in the photosynthesis reaction according to the following equation? 6Co2(g) + 6H)CH12Qa(ag)+ 60(g) If 1g of CeH12Os was produced how many grams of COz must have reacted?

Explanation / Answer

1) Write the balanced chemical equation for the reaction.

CaCO3 (s) -------> CaO (s) + CO2 (g) + H2O (g)

As per the stoichiometric equation,

1 mole CaCO3 = 1 mole CO2.

Molar mass of CO2 = (1*12 + 2*16) g/mol = 44 g/mol.

132 g CO2 = (132 g CO2)*(1 mole CO2/44 g CO2) = 3 mole CO2.

Mole(s) of CaCO3 decomposed = 3 moles.

Molar mass of CaCO3 = (1*40 + 1*12 + 3*16) g/mol = 100 g/mol.

Mass of CaCO3 decomposed = (3 moles)*(100 g/1 mole) = 300 g (ans).

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