Chemistry, 17.09.2021 02:00 NNopeNNopeNNope
Please help.. During a laboratory experiment, you are given a clear, colorless liquid. Upon heating, you discover a vapor is produced and solid white crystals remain in the test tube. Which of the following correctly describes the original liquid?
Mixture
Pure substance
Element
Compound
Answers: 3
Chemistry, 22.06.2019 00:20, paulawells11
What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?
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Compare and contrast the bohr model and the electron cloud models of the atom.
Answers: 1
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
Chemistry, 22.06.2019 17:40, aguilarjose
If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?
Answers: 1
Please help.. During a laboratory experiment, you are given a clear, colorless liquid. Upon heating,...
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