I am very confused, our teacher didn’t properly teach us this. How do you do it?
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Chemistry, 16.11.2020 08:40 schapethan
I am very confused, our teacher didn’t properly teach us this. How do you do it?
Answers: 2
Chemistry, 22.06.2019 02:30, drivinghydra
What is the relation between concentration of reactants and the rate of chemical reaction?
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 15:30, abdullaketbi71
What best discribes the relationship between wavelength and frequency in a electromagnetic wave
Answers: 1
Mathematics, 31.12.2019 09:31
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