Chemistry, 02.10.2019 22:00 germainenez3288
At what temperature will a fixed amount of gas with a volume of 175 l at 15 degrees celsius and 760mmhg occupy a volume of 198l at a pressure of 640mmhg?
Answers: 3
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Harvey mixes two liquids. which observation of the new mixture most likely indicates a precipitate is forming?
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Chemistry, 21.06.2019 22:30
Which type of bond is present in hydrogen sulfide (h2s)? the table of electronegativities is given. a. hydrogen b. ionic c. nonpolar covalent d. polar covalent
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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.)
Answers: 1
At what temperature will a fixed amount of gas with a volume of 175 l at 15 degrees celsius and 760m...
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