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3 years ago

14

What happens to in the protoplanetary

1 answer:

blagie [28]3 years ago

3 0

What will happen to a protoplanetary is that it may also be considered an accretion disk for the stars itself, because gasses or other material may be falling from the inner edge of the disk onto the surfaces of the stars.

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What is Gibbs free energy?

irakobra [83]

<span>The answer is A. In chemistry, Gibbs Free Energy is defined as the enthalpy of the system minus the product of the temperature times the entropy of the system. To write it as a formula, G = H - TS, delta G=delta H-T*delta S, where delta denotes the change.</span>

8 0

4 years ago

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Why would dry cleaners use non polar tetrachloroethylene,C2cl4 to get hamburger grease out of your shirt

Anna35 [415]

Grease and non-polar too, so the <span>tetrachloroethylene would be a solvent.</span>

7 0

3 years ago

Two hundred kg of liquid contains 30% butane, 40% pentane, and the rest hexane (mass %) Determine: The mole fraction composition

OlgaM077 [116]

Answer:

The mole fraction composition of the liquid is :

Mole fraction of butane, pentane and hexane are 0.3638,0.3908 and 0.2454 respectively.

Explanation:

Mass of the liquid mixture = 200 g

Percentage of butane = 30%

Mass of butane = $\frac{30}{100}\times 200 g=60 g$

Moles of butane = $n_1=\frac{60 g}{58 g/mol}=1.0345 mol$

Percentage of pentane= 40%

Mass of pentane= $\frac{40}{100}\times 200 g=80 g$

Moles of pentane= $n_2=\frac{80 g}{58 g/mol}=1.1111 mol$

Percentage of hexane = 100% - 30% - 40% = 30%

Mass of hexane = $\frac{30}{100}\times 200 g=60 g$

Moles of hexane = $n_2=\frac{60 g}{86 g/mol}=0.6977 mol$

Mole fraction of butane, pentane and hexane : $\chi_1, \chi_2 \& \chi_3$

$\chi_1=\frac{n_1}{n_1+n_2+n_3}=\frac{1.0345 mol}{1.0345 mol+1.1111 mol+0.6977 mol}=0.3638$

$\chi_2=\frac{n_2}{n_1+n_2+n_3}=\frac{1.1111 mol}{1.0345 mol+1.1111 mol+0.6977 mol}=0.3908$

$\chi_3=\frac{n_1}{n_1+n_2+n_3}=\frac{0.6977 mol}{1.0345 mol+1.1111 mol+0.6977 mol}=0.2454$

4 0

4 years ago

Which metalloid has three valence electrons? 1. Lithium 2. boron 3. silicon 4. aluminum 5. arsenic

iren [92.7K]

Answer:

boron

Explanation:

5 0

4 years ago

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Which of the following is most likely an indication of a chemical change?

gayaneshka [121]

Answer:

B.

Explanation:

Because when a pistol is fired, chemical changes happen to light the gunpowder or whatever substance to create the noise or effect.

5 0

3 years ago