Chemistry, 23.08.2019 01:00 georgesk2030
What is the ph of ammonia? i know the ph of ammonia varies depending on concentration, so what's the ph of pure ammonia?
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Chemistry, 21.06.2019 20:30
In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust
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Chemistry, 22.06.2019 10:00
Nonpoint source pollution is difficult to control because it
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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) → 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.)
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What is the ph of ammonia? i know the ph of ammonia varies depending on concentration, so what's th...
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