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Ksju [112]
3 years ago
15

How would you calculate an object’s mechanical energy?

Chemistry
1 answer:
podryga [215]3 years ago
7 0
Mechanical energy=

Kinetic energy + potential energy

Hope this helped!
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Each element has a unique number of ___
Zigmanuir [339]
the answer is protons
4 0
3 years ago
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g A closed-end manometer was attached to a vessel containing argon. The difference in the mercury levels in the two arms of the
ElenaW [278]

Answer:

Answer: 882mmHg

Explanation:

In a closed-end manometer, the gas added is under a pressure that is measured against atmospheric pressure. The difference in pressure between both gases is equal to the difference in mercury levels. Thus, the pressure of the argon can be:

783 mmHg - 96.0mmHg = 687mmHg

783 mmHg - 96.0mmHg = 879mmHg

Based on the options, the possible answer (The nearest to the second value) is:

<h3>Answer: 882mmHg</h3>

7 0
3 years ago
Be strong
sesenic [268]

Nice written.

Is it written by you yourself or you have copied it from somewhere?

7 0
3 years ago
The columns in the periodic table are also called A. sets. B. periods. C. families. D. energy levels
faust18 [17]
It depends if you are talking about the ones that go up or down
or left and right

the ones that go up and down are called groups

the onesthat go left and right are periods

3 0
3 years ago
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Calculate the equilibrium constant at 298 K for the reaction of formaldehyde (CH2O) with hydrogen gas using the following inform
Mariana [72]

Answer:

E. 8.08 x 10⁴.

Explanation:

Hello,

In this case, for the reaction:

CH_2O(g) + 2H_2(g)  \rightleftharpoons CH_4(g) + H_2O(g)

We can compute the Gibbs free energy of reaction via:

\Delta G\°=\Delta H\°-T\Delta S\°

Since both the entropy and enthalpy of reaction are given at 298 K (standard temperature), therefore:

\Delta G\°=-94.9kJ-(298K)(-224.2\frac{J}{K}*\frac{1kJ}{1000kJ} )\\\\\Delta G\°=-28.1kJ

Then, as the equilibrium constant is computed as:

K=exp(-\frac{\Delta G\°}{RT} )

We obtain:

K=exp(-\frac{-28.1kJ/mol}{8.314x10^{-3}\frac{kJ}{mol* K}}*298K )\\\\K=8.08 x10^4

For which the answer is E. 8.08 x 10⁴.

Best regards,

3 0
4 years ago
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