Chemistry, 14.02.2021 23:50 2020IRodriguez385
1. Determine the Potential Energy of a 4 kg ball that is 5 m above the surface. Remember that gravity on Earth is 9.8 m/s2 .
PE = m X d X g
2. What are two examples of chemical energy?
Answers: 1
Chemistry, 21.06.2019 22:10
Here’s one way to follow the scientific method. place the missing steps in the correct position in the process
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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 00:00
#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.
Answers: 1
Chemistry, 23.06.2019 08:30
Explain how to convert from one unit to another in the metric system.
Answers: 3
1. Determine the Potential Energy of a 4 kg ball that is 5 m above the surface. Remember that gravit...
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