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zubka84 [21]
4 years ago
14

PLEASE NEED HELP QUICK DEADLINE SOON

Chemistry
1 answer:
Nadya [2.5K]4 years ago
6 0

Answer:

D. Protons ; neutrons.

Explanation:

For a given element the number of protons is fixed, but the number of neutrons differ because the element usually consist of a number of isotopes.

For example Carbon has isotopes which contain 12, 13 and 14 neutrons.

So that is why you average the number of neutrons to find the approximate atomic mass..

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How does the chemistry of life relate to cellular respiration
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Answer:

¿Cuál es la reaccion quimica de la respiracion celular?

La respiración celular es una reacción exergónica, donde parte de la energía contenida en las moléculas de alimento es utilizada por la célula para sintetizar ATP. ... Aproximadamente el 40% de la energía libre emitida por la oxidación de la glucosa se conserva en forma de ATP.

Explanation:

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3 years ago
A metal ice-cube tray and a plastic tub of ice cream are sitting in the freezer. Why does
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Answer:

the D

Explanation:

The metal ice-cube tray has a higher conductivity

6 0
4 years ago
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You respond to a highway incident in which a road trailer has turned onto its side and is heard to be leaking. You can see the p
tino4ka555 [31]

Answer:

The correct answer is propane.

Explanation:

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Have a nice day!

8 0
3 years ago
The elementary reaction 2H2O(g)↽−−⇀2H2(g)+O2(g) proceeds at a certain temperature until the partial pressures of H2O, H2, and O2
jenyasd209 [6]

Answer:

1.742\times 10^{-5} is the value of the equilibrium constant at this temperature.

Explanation:

2H_2O\rightleftharpoons 2H_2+O_2

We are given:

Partial pressure of H_2O=p^o_{H_2O}=0.0750 atm

Partial pressure of H_2=p^o_{H_2}=0.00700 atm

Partial pressure of O_2=p^o_{O_2}=0.00200 atm

The expression of K_p for the given chemical equation is:

K_p=\frac{p^o_{H_2}^2\times p^o_{O_2}}{p^o_{H_2O}^2}

Putting values in above equation, we get:

K_p=\frac{(0.00700 atm)^2\times 0.00200 atm}{(0.0750 atm)^2}\\\\K_p=1.742\times 10^{-5}

1.742\times 10^{-5} is the value of the equilibrium constant at this temperature.

3 0
4 years ago
What is the pressure in a container that has 3 atm H2, 2 atm of N2 and 5 atm of F2?
LekaFEV [45]
<h3>Pressure has additive properties meaning that if you add the partial pressures together, you obtain total pressure.  P total = P1 + P2 + P3 + ...  Pressure of container = pressure of H2 + Pressure of N2 + Pressure of F2                                          = 3atm + 2atm + 5atm                                                        = 10atm    Hope that helped. ;)</h3>
7 0
3 years ago
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