Chemistry, 01.08.2019 19:30 penaabel1492
Why must the mass of the anhydrous salt be measured relatively soon after heating?
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Chemistry, 22.06.2019 01:40
C3h8o3 - glycerol major species present when dissolved in water
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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) โ h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 ยฐc. 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 19:30
Acetylene gas c2h2 undergoes combustion to produce carbon dioxide and water vapor how many grams of water are produced by the same amount of c2h2?
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Chemistry, 22.06.2019 19:30
Phosphorous can form an ion called phosphide, which has the formula p3โ. this ion can form an ion called phosphide, which has the formula p3โ. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons
Answers: 2
Why must the mass of the anhydrous salt be measured relatively soon after heating?...
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