Answers: 2
Chemistry, 22.06.2019 08:00
What is the molarity of 60.0 grams of naoh dissolved in 750 milliliters of water? a) 1.1 m b) 2.0 m c) 12 m d) 75 m
Answers: 1
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.)
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Chemistry, 22.06.2019 15:00
What is the most important factor in determining climates.
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Chemistry, 23.06.2019 01:10
Volume is a measurement of how fast particles of a substance are moving
Answers: 3
Rubbing alcohol evaporates from your arm quickly, leaving a cooling effect on your skin. how do the...
Mathematics, 23.06.2019 14:10
History, 23.06.2019 14:10
Mathematics, 23.06.2019 14:10
Mathematics, 23.06.2019 14:10
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English, 23.06.2019 14:10
Mathematics, 23.06.2019 14:10
English, 23.06.2019 14:10