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exis [7]
3 years ago
8

A child is on a pogo stick. At the top of her jump, her kinetic energy (KE) = 0 J, her gravitational potential energy (GPE) = 10

0 J, and the potential energy in the spring (SPE) = 0 J. At the bottom of the jump, immediately before the child jumps again, what do KE, GPE, and SPE equal? (Assume a closed system.
A) KE = 0 J, GPE = 100 J, and SPE = 0 J
B) KE = 50 J, GPE = 0 J, and SPE = 50 J
C) KE = 100 J, GPE = 0 J, and SPE = 0 J
D) KE = 0 J, GPE = 0 J, and SPE = 100 J
Chemistry
1 answer:
krek1111 [17]3 years ago
7 0
There would be 0 Potential energy, which eliminates A. There would be Spring energy, which eliminates C. So B and D are your 2 choices. Since the child is not moving just before the jump, there would be 0 Kinetic energy. So D.

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If 23.6 g of hydrogen gas reacts with 28.3 g of nitrogen gas, what is the maximum amount of product that can be produced?
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Answer:

34.3 g NH3

Explanation:

M(H2) = 2*1 = 2 g/mol

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M(NH3) = 14 + 3*1 = 17 g/mol

23.6 g H2* 1 mol/2 g = 11.8 mol H2

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from reaction         3 mol    1 mol

given                   11.8 mol    1.01 mol

We can see that H2 is given in excess, N2 is limiting reactant.

                                 3H2 + N2 ------> 2NH3

from reaction                     1 mol         2 mol

given                                 1.01 mol      x

x = 2*1.01/1= 2.02 mol NH3

2.02 mol * 17g/1 mol ≈ 34.3 g NH3

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3 years ago
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<h3>What is the thyroid hormone?</h3>

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Therefore, the thyroid hormone contains the mineral iodine.

Learn more about thyroid at: brainly.com/question/13856314

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