Chemistry, 23.08.2019 12:20 drashanhparekh123
How does bohr's model differ from rutherford's model? ?
Answers: 1
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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Chemistry, 22.06.2019 15:00
Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.
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Chemistry, 22.06.2019 17:30
Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by
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Chemistry, 23.06.2019 03:50
Show how to convert the temperature 84.7° c to kelvin. include all steps and label the final answer.
Answers: 1
How does bohr's model differ from rutherford's model? ?...
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