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Chemistry, 21.06.2019 16:00, shamayajohnsonsh5
One of the cell membrane's functions is to protect the cell keep wastes in the cell create new cells keep light out of the cell
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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.)
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Chemistry, 22.06.2019 16:50, lilblackbird4
Answer asap need by wednesday morning calculate the ph of 0.036m naoh best answer will be brainliest
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A certain element exists as three different isotopes. 24.1% of all the isotopes have a mass of 75.23...
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