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3 years ago

Why are invasive species such a huge threat to ecosystems?

Chemistry

1 answer:

Varvara68 [4.7K]3 years ago

8 0

Answer:

Explanation:

invasive species can do intense damage so much that ecosystems may not be able to recover.

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Mg+o2 balanced eaquation

Tanya [424]

Answer:

2Mg+O2=2MgO

balanced equation

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3 years ago

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Volume Conversion Problem

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Answer:

4,997.9

Explanation:

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3 years ago

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Answer:

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3 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.

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4 years ago

Percent yield ? how do i do this

Naddik [55]

Answer:Is this from the stochiometry unit?

Explanation:

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3 years ago