Chemistry, 02.03.2021 17:40 ceeejay0621
Petra and Huy are doing a class demonstration to show that solids, liquids, and gases all have mass. They use a balance for the solids and the liquids. They wondered if gases have mass.
Which is the best way for them to show that air has mass?
Use a fan to make a current of air.
Compare the masses of two inflated balloons.
Heat water to show it changing to water vapor.
Compare the masses of an inflated and empty balloon.
Answers: 1
Chemistry, 22.06.2019 02:30, brittanysanders
When you perform this reaction, what could remain at the end of the reaction? check all that apply. excess reactant aqueous copper chloride excess reactant aluminum oxygen product solid copper carbon dioxide product aqueous aluminum chloride water
Answers: 2
Chemistry, 22.06.2019 06:00, jwood287375
When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?
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Chemistry, 22.06.2019 10:00, valdezlizbeth6652
Why is carbon ideal for making different compounds?
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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.)
Answers: 1
Petra and Huy are doing a class demonstration to show that solids, liquids, and gases all have mass....
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