Chemistry, 01.07.2019 05:00 julionavedo21
Brock brings a magnet near a metal object. a magnetic force acts on an object, pulling it upward. which of the following best describes the magnetic force? a. a force that acts at a distance b. a gravitational foce c. a frictional force d. a contact force
Answers: 1
Chemistry, 21.06.2019 19:30, angelinadhar
What are the percent by mass of copper in penny lab
Answers: 3
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 15:20, Tringirl233
Identify arrows pointing to bonding electrons. done h-0-0-h ) intro
Answers: 3
Brock brings a magnet near a metal object. a magnetic force acts on an object, pulling it upward. wh...
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