1. what is the colour of feso4.7h20 crystals? how does this colour change upon heating? give balanced
chemical equation for the changes.
2. a. what are redox reactions?
b. why is the reaction between mno2 and hcl a
redox reaction?
c. identify the substance oxidized and the
substance reduced in the above reaction.
3. balance the chemical equation: -
fe(s) + h2o(g)=fe3o4(s) + h2(g)
4. explain why:
a)respiration is an exothermic reaction.
b)all decomposition reactions are endothermic
reactions.
Answers: 3
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0.09 moles of sodium sulfate in 12 ml of solution
Answers: 3
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11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg
Answers: 3
1. what is the colour of feso4.7h20 crystals? how does this colour change upon heating? give balanc...
Biology, 09.08.2019 22:30
Biology, 09.08.2019 22:30
Biology, 09.08.2019 22:30