Chemistry, 09.07.2020 14:01 ethancarter560
Label the following reactions as oxidation or reduction. Cr+3(aq) + 3e-s → Cr Ag(s) → 1e-s + Ag+1(ag) Mn(s) → 5e-s + Mn+5(aq) Sn+2(aq) + 2e-s → Sn
Answers: 3
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 18:30
How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it
Answers: 3
Chemistry, 23.06.2019 08:40
The activation energy for this reaction is 75 kj·mol–1. the enzyme catalase (found in blood) lowers the activation energy to 8.0 kj·mol–1. at what temperature would the non-catalyzed reaction need to be run to have a rate equal to that of the enzyme-catalyzed reaction at 25°c?
Answers: 2
Chemistry, 23.06.2019 10:30
Describe the hybridization of each carbon and nitrogen atom in each of the following structures
Answers: 1
Label the following reactions as oxidation or reduction. Cr+3(aq) + 3e-s → Cr Ag(s) → 1e-s + Ag+1(a...
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