Chemistry, 27.06.2019 02:30 kana13

When you see an image of a solid the particles of the solid are usually packed but in fact there may be some between them.

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Chemistry, 21.06.2019 21:50, kyleighmarie05

H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?

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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 12:10, yootmytoot

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution. calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

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Chemistry, 22.06.2019 18:00, shawn423

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate

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When you see an image of a solid the particles of the solid are usually packed but in fact there ma...