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1 year ago

a fraction collected during distillation ethanol-water what is the mass of ethanol that is present in this fraction

Chemistry

1 answer:

AURORKA [14]1 year ago

4 0

Answer:

80 kg

Explanation:

because the liquid with high boiling point is going to be collected the first

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According to Boyle's law, the volume of a gas is inversely proportional to its pressure at constant temperature.

meriva

Answer:

true

Explanation:

7 0

3 years ago

Read 2 more answers

Consider the equilibrium reaction. 2 A + B − ⇀ ↽ − 4 C After multiplying the reaction by a factor of 2, what is the new equilibr

vredina [299]

Answer : The correct expression for equilibrium constant will be:

$K_c=\frac{[C]^8}{[A]^4[B]^2}$

Explanation :

Equilibrium constant : It is defined as the equilibrium constant. It is defined as the ratio of concentration of products to the concentration of reactants.

The equilibrium expression for the reaction is determined by multiplying the concentrations of products and divided by the concentrations of the reactants and each concentration is raised to the power that is equal to the coefficient in the balanced reaction.

As we know that the concentrations of pure solids and liquids are constant that is they do not change. Thus, they are not included in the equilibrium expression.

The given equilibrium reaction is,

$4A+2B\rightleftharpoons 8C$

The expression of $K_c$ will be,

$K_c=\frac{[C]^8}{[A]^4[B]^2}$

Therefore, the correct expression for equilibrium constant will be, $K_c=\frac{[C]^8}{[A]^4[B]^2}$

4 0

2 years ago

Please help I will give brainliest!

Fiesta28 [93]

Answer:

b, H2O(s) r H2O(g)

Explanation:

entropy is heat, so increase in heat would mean water gets evaporated or melted, or both in this case. so the only choice above that showed increase in heat is from solid(ice) to gas(water vaper) due to increase in heat in the reaction.

7 0

2 years ago

Which of the following is the car average speed?

kap26 [50]

Answer:

it would be 100 km/hr

Explanation:

if you divide each speed by the time you get 100 each time

4 0

3 years ago

A streak test is used to identify minerals by looking at the color of the streak made by rubbing the mineral against rough, unco

Tomtit [17]

C. quartz and amethyst

Explanation:

Quartz and amethyst can be told apart by their color without performing a streak test on them.

This is because from the given choices, their color is different.

quartz is a colorless

amethyst is purple

Quartz is silicate mineral purely made of silicon and oxygen.
Amethyst is a variety of quartz but containing some mineral inclusions that makes its color different.
Preforming the streak test gives their color to be white.
This cannot be useful in identifying the minerals they contain.
Since their natural colors are distinct, it is a more diagnostics tool .

learn more:

Silicate minerals brainly.com/question/4772323

#learnwithBrainly

5 0

2 years ago