16. brass is an alloy made up of
a. aluminium and zinc.
b. copper and tin
c. copper a...
Chemistry, 06.10.2019 23:00, kaseywright3418
16. brass is an alloy made up of
a. aluminium and zinc.
b. copper and tin
c. copper and zinc.
d. iron and carbon
Answers: 1
Chemistry, 22.06.2019 07:00, uniqueray33
What effect does a decrease in temperature have on the overall rate of a chemical reaction? a decrease in temperature decreases . the reaction rate will
Answers: 1
Chemistry, 22.06.2019 11:40, Wemaybewrong
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 11:50, bellojamilet410
What substance has a mass of 9.5g and volume of 2.1cm^3
Answers: 2
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