Chemistry, 09.12.2019 22:31 jashaikamatuteowwp1p
If john had to drive 873 miles by going 75mph, how long would it take john to reach his destination?
Answers: 1
Chemistry, 22.06.2019 08:30, aydenmasonc
Which statement describes james chadwick’s discovery.
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Chemistry, 22.06.2019 09:30, mazielynn84
In 2002, the rare earth elements mine in mountain pass, california was closed because
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Chemistry, 22.06.2019 10:30, tjjjjjjjjjjjjjjjjjjj
What determines the average kinetic energy of the particles in a gas? a. the number of collisions b. the number of particles c. the size of the particles d. the temperature
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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
If john had to drive 873 miles by going 75mph, how long would it take john to reach his destination?...
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