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3 years ago

Can someone help me on the last questions?

Chemistry

1 answer:

valina [46]3 years ago

6 0

9: 9x3 . (4x - 1)

10: (x + 7) . (7 - x)

I hope that this helps you.

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find the total pressure of a gas that initially occupied 27 L at 32 degrees Celsius and 2.5 atm, if the final conditions are 12

yawa3891 [41]

Answer: Total pressure of the gas will be 0.716atm.

Explanation: We are given a gas having initial conditions as

V = 27L

T = 32°C = 305K

P = 2.5atm

As the gas remains same, number of moles of a gas will also be same for initial and final conditions. To calculate the number of moles, we use ideal gas equation, which is,

$PV=nRT$ .......(1)

where, R = gas constant = $\text{0.08206 L atm }mol^{-1} K^{-1}$

For calculating number of moles:

$n=\frac{PV}{RT}$

Putting the values of initial condition in this equation, we get

$n=\frac{(2.5atm)(27L)}{\text{(0.08206 L atm }mol^{-1} K^{-1})(305K)}$

n = 2.696 mol

Now, the final conditions are,

V = 88.0L

T = 12°C = 285K

n = 2.696 mol (calculated above)

P = ? atm

Again using equation 1, we get

$P=\frac{nRT}{V}$

$P=\frac{(2.696mol)(\text{0.08206 L atm }mol^{-1} K^{-1})(285K)}{88.0L}$

P = 0.716atm.

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kati45 [8]

Dehydration synthesis

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The rate at which a substance evaporates is called what?

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Evaporation rate: This is the rate at which a substance evaporates compared to either ether, which evaporates quickly, or butyl acetate, which evaporates slowly. If the substance has an evaporation rate greater than one, it evaporates faster than the comparison substance.

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Is the following nuclear equation balanced? yes no

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Yes because I went through college and learned this

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