Chemistry, 07.01.2020 11:31 lifeisbowling59
The reaction of sodium peroxide and water produces sodium hydroxide and oxygen gas. the following balanced chemical equation represents the reaction.
2 na^2o^2(s) + 2 h2o(l) → 4 naoh(s) + o^2(g)
if 15.7 moles of sodium hydroxide are produced, how many moles of o2 will be made?
Answers: 1
Chemistry, 22.06.2019 11:40
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
Answers: 1
Chemistry, 22.06.2019 13:00
12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer
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Chemistry, 22.06.2019 14:00
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The reaction of sodium peroxide and water produces sodium hydroxide and oxygen gas. the following ba...
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