5 Lucy heats some calcium carbonate. She weighs the reaction vessel at the
start of the reaction and again after it has been heated. Calcium carbonate decomposes into calcium oxide and carbon dioxide.
Look at Lucy's results:
Mass of calcium carbonate before heating = 2.00 g
Mass of calcium oxide left after heating = 1.129
Calculate the mass of carbon dioxide that was released during the
decomposition. Show all your workings.
Answers: 1
Chemistry, 22.06.2019 16:00
Which factor is likely to impact the possible number of compounds ?
Answers: 1
Chemistry, 22.06.2019 21:50
Answer the questions about this reaction: nai(aq) + cl2(g) β nacl(aq) + i2(g) write the oxidation and reduction half-reactions: oxidation half-reaction: reduction half-reaction: based on the table of relative strengths of oxidizing and reducing agents (b-18), would these reactants form these products? write the balanced equation: answer options: a. 0/na -> +1/na+1e- b. nai(aq) + cl2(g) β nacl(aq) + i2(g) c. +1/na+1e- -> 0 /na d. -1/2i -> 0/i2+2e- e. no f. 4nai(aq) + cl2(g) β 4nacl(aq) + i2(g) g. 2nai(aq) + cl2(g) β 2nacl(aq) + i2(g) h. 4nai(aq) + 2cl2(g) β 4nacl(aq) + 2i2(g) i. nai(aq) + cl2(g) β nacl(aq) + i2(g) j. 0/cl2+2e -> -1/2cl- k. yes
Answers: 1
5 Lucy heats some calcium carbonate. She weighs the reaction vessel at the
start of the reaction an...
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