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3 years ago

What is the name of the molecule shown? Will give brainliest if its right.

Chemistry

1 answer:

nadezda [96]3 years ago

8 0

D. Pentane. Pentane has 5 Carbon and 12 Hydrogen, like the molecule shown.

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What was technicalagy like in the past

V125BC [204]

Most of it was analog

8 0

2 years ago

Read 2 more answers

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

Name some ways of water irrigation.

Ivanshal [37]

Answer:

Surface Irrigation. Water is scattered equally throughout the land with the help of gravitational pull and it doesn’t require a machine to take care of it.

Localized Irrigation. Water is scattered throughout the land under low pressure.

Drip Irrigation. In this process of drip irrigation, the water drops fall on the root of every plant that is around the system.

Explanation:

3 0

2 years ago

what property easily changes in gases but does not easily change in solids a.mass b.color c.shape d.smell

liq [111]

C. Shape, because increasing pressure has a profound influence on the volume of a gas sample, for example, it pushes the particles closer together; thus gases are considered compressible.

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3 years ago

Please answer this correctly!

Marina CMI [18]

Answer:

International is the answer duh

4 0

2 years ago