Chemistry, 22.12.2019 05:31 hrijaymadathil
An increase in the average kinetic energy of a sample of copper atomsoccurs with an increase in(1) concentration (3) pressure(2) temperature (4) volume
Answers: 2
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) ā h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 Ā°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 14:40
Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d
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Chemistry, 23.06.2019 02:00
Now look at the segment of the graph between the two data points marked with black squares. describe how the boiling point and melting point plots behave between these points. be as specific as possible.
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Chemistry, 23.06.2019 03:30
Calculate the ph of a .10m nh4cl solution. the kb value for nh3 is 1.8Ć10^-5
Answers: 1
An increase in the average kinetic energy of a sample of copper atomsoccurs with an increase in(1) c...
Computers and Technology, 02.12.2019 21:31
Computers and Technology, 02.12.2019 21:31
Mathematics, 02.12.2019 21:31
Mathematics, 02.12.2019 21:31
Mathematics, 02.12.2019 21:31