Chemistry, 01.09.2021 17:20 guzmangisselle
Which event was the most immediate action taken after publication of Rachel Carson's book Silent Spring?
O President Kennedy ordered a panel of scientists to appraise the DDT hazard.
O President Kennedy banned DDT over the objections of experts.
O DDT was banned in the United States by the Department of Agriculture.
o The chemical industry took the lead in restricting the sale and use of DDT
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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) β h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 Β°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, 23.06.2019 01:00
Iron (fe) reacts with copper sulfate (cuso4) to form iron (ii) sulfate. in this reaction, cu2+ gains electrons to form cu. which statement is true about this reaction? fe(s) + cuso4(aq) β feso4(aq) + cu(s)
Answers: 3
Chemistry, 23.06.2019 09:00
Chortling is used to clean water. another possible atom that would also work is a. sodium b. sulfur c. bromine
Answers: 1
Which event was the most immediate action taken after publication of Rachel Carson's book Silent Spr...
Mathematics, 13.08.2020 22:01
Mathematics, 13.08.2020 22:01