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2 years ago

Which is a natural cause of soil erosion? a.deforestationb.overgrazingc.agricultured.moving watere.construction

Chemistry

1 answer:

ss7ja [257]2 years ago

5 0

Answer choice "A. Defrostration " is the only "natural" cause of soil erosion

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Sam places 5 g of baking soda in 5 g of liquid vinegar, and notices fizzing. After all the fizzing stops, 5 g of liquid remains.

anygoal [31]

Answer: G

5+5=10

10-5=5

5 g of gas escaped

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2 years ago

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Which element(s) are not balanced in this equation?

poizon [28]

The correct response is A. Only the Fe is unbalanced.

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2 years ago

Enter a range of values for x, 2x+10, 14

PIT_PIT [208]

Answer:

62 degrees and 15.

Explanation:

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2 years ago

Which statement best describes the role that gravity played in the formation of our solar system?

telo118 [61]

I would say
D. Gravity pulled particles of dust and gas together to form planets.Hope it helped!

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2 years ago

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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