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JulsSmile [24]
3 years ago
14

An element can be identified as either a ________, __________, or a __________

Chemistry
2 answers:
motikmotik3 years ago
5 0
Liquid or a solid :)

dexar [7]3 years ago
4 0
Solid, Liquid, or a Gas
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What is the difference between speed and acceleration?<br> Please help :)
ioda

Answer:

Speed is how fast you are going at the moment but acceleration is how fast you are building up speed to get to a set point

Explanation:

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3 years ago
CH3OH can be synthesized by the reaction:
Leviafan [203]

Answer:

5

Explanation:

8 0
3 years ago
What is the error in the electron configuration, 1s2 2s2 2p6 3s2 3p5 4s2?
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1s2 2s2 2p6 3s2 3p6 4s1

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3 years ago
If a(n) __________ is applied, the equilibrium shifts to relieve this change in conditions.
elixir [45]

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the answer is D. stress

If a stress is applied, the equilibrium shifts to relieve this change in conditions.

6 0
2 years ago
An ideal gas sealed in a rigid 4.86-L cylinder, initially at pressure Pi=10.90 atm, is cooled until the pressure in the cylinder
seraphim [82]

Answer:

\Delta H=-11897J

Explanation:

Hello,

In this case, it is widely known that for isochoric processes, the change in the enthalpy is computed by:

\Delta H=\Delta U+V\Delta P

Whereas the change in the internal energy is computed by:

\Delta U=nCv\Delta T

So we compute the initial and final temperatures for one mole of the ideal gas:

T_1= \frac{P_1V}{nR}=\frac{10.90atm*4.86L}{0.082*n}=\frac{646.02K  }{n} \\\\T_2= \frac{P_2V}{nR}=\frac{1.24atm*4.86L}{0.082*n}=\frac{73.49K  }{n}

Next, the change in the internal energy, since the volume-constant specific heat could be assumed as ³/₂R:

\Delta U=1mol*\frac{3}{2} (8.314\frac{J}{mol*K} )*(73.49K-646.02K )=-7140J

Then, the volume-pressure product in Joules:

V\Delta P=4.86L*\frac{1m^3}{1000L} *(1.24atm-10.90atm)*\frac{101325Pa}{1atm} \\\\V\Delta P=-4756.96J

Finally, the change in the enthalpy for the process:

\Delta H=-7140J-4757J\\\\\Delta H=-11897J

Best regards.

7 0
3 years ago
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