Chemistry, 06.05.2021 23:40 xxxanitaxxx
The pressure of a sample of gas is measured at sea level with a closed-end manometer. The liquid in the manometer is mercury which density is equal to 13600 kg/m3. Determine the pressure of the gas in kPa if d=13cm and atmospheric pressure is equal to 1013 hPa.
Answers: 2
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
Chemistry, 23.06.2019 02:00
Which would freeze at a higher temperature: the great salt lake or lake tahoe? a. lake tahoe would freeze at a higher temperature. b. the great salt lake would freeze at a higher temperature. c. both lakes would freeze at the same temperature.
Answers: 2
Chemistry, 23.06.2019 03:50
Show how to convert the temperature 84.7° c to kelvin. include all steps and label the final answer
Answers: 1
Chemistry, 23.06.2019 14:20
Identificaa 5 características que comparten las guacamayas y dos caracteristicas que las hagan diferentes
Answers: 1
The pressure of a sample of gas is measured at sea level with a closed-end manometer. The liquid in...
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