Part A) Barium carbonate, as many other metal carbonates, decomposes at heating producing barium oxide and carbon dioxide gas. If standard enthalpy ΔHorxn of barium carbonate decompostion is 269.3 kJ/mol, how many kilojoules of energy are required to decompose 10.0 g of barium carbonate? (a) 27.28 (b) 13.64 (c) 7.82 (d) 40.92 (e) none of those. If so, what is you answer?
Part A) Barium carbonate, as many other metal carbonates, decomposes at heating producing barium oxide and carbon dioxide gas. If standard enthalpy ΔHorxn of barium carbonate decompostion is 269.3 kJ/mol, how many kilojoules of energy are required to decompose 10.0 g of barium carbonate?
(a) 27.28 (b) 13.64 (c) 7.82 (d) 40.92
(e) none of those. If so, what is you answer?
Part B) Sodium hydroxide in the amount of 10.0 g is allowed to react with 1.12 L of carbon dioxide gas at STP 2NaOH(s) + CO2(g) => Na2CO3(s) + H2O(g)
and the product dried out to permanent weight.
What will be the mass of the product?
(a) 12.7 g (b) 11.2 g (c) 13.3 g (d) 6.62 g
(d) None of those. If so, what is your answer?
Part C) In sulfur dichloride molecule, the number of non-bonding electron pairs on central atom is:
(a) 0 (b) 1 (c) 2 (d) 3
Part D) The shape of the sulfur tetrafluoride molecule is:
(a) tetrahedral (b) square planar (c) square pyramidal (d) see-saw
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