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Zigmanuir [339]
3 years ago
8

During and exothermic reaction, energy is _______ the surroundings.

Chemistry
1 answer:
Kitty [74]3 years ago
4 0
Your answer is A mixed with.

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A sample of neon occupies a volume of 478 mL at STP. What will be the volume of the neon when the pressure is reduced to 93.3 kP
Andre45 [30]

The volume of neon when the pressure is reduced to 93.3 kPa is 519 mL.

Explanation:

The kinetic theory of gases is mostly based on Boyle's law. From the Boyle's law, the pressure experienced by any gas molecules is inversely proportional to volume of the gas molecules. Also this inverse relation is obeyed if and only if the number of moles and temperature of the gas molecules remained constant.

So,P=\frac{1}{V}

So if there is a change in pressure then there will be inverse change in volume. That means if there is decrease in the pressure of gas molecules then there will be increase in the volume and vice versa.

So the Boyle's law is combined as P_{1} V_{1} = P_{2} V_{2}

As here the initial pressure or P_{1} is 1 atm or 101.3 kPa and the initial volume is 478 mL. Similarly, the final pressure is 93.3 kPa and the final volume will be

101.3*10^{3}*478*10^{-3}  = 93.3*10^{3} * V_{2}

V_{2} = 519 mL

So, the volume of neon when the pressure is reduced to 93.3 kPa is 519 mL.

5 0
4 years ago
At equilibrium, a 1.00 M OClÈ solution has an [OHÈ] of 5.75 × 10ÈÊ M. Which of the following is the correct pH of the solution?
omeli [17]
<span>pOH = 9.2 

pH = 4.8</span><span>
That's your </span>answer!!

Hope I helped!! :)
3 0
3 years ago
The Lithium atom has only two energy levels. The third is empty. Therefore, we can refer to the second energy level of the lithi
Minchanka [31]

Answer:

H=1

Li=1

Na=1

Be=2

Mg=2

B=3

Al=3

C=4

Si=4

N=5

P=5

O=6

S=6

F=7

Cl=7

Ne=8

Ar=8

He=8

Explanation:

5 0
3 years ago
Three compounds containing potassium and oxygen are compared. Analysis shows that for each 1.00 g of O, the compounds have 1.22
kicyunya [14]
<span>The law of proportion states that elements combine in whole number ratios. The gram readings for K are multiples of each other, both in grams and moles.
Let us compare the ratios:
</span>2.44 grams/1.22 grams = 2
<span>4.89 grams/2.44 grams = 2</span>

<span>Therefore, Potassium always combines with Oxygen in a ratio of 2  is to 1.</span>
4 0
4 years ago
Which describes the composition of carbohydrates?
UkoKoshka [18]

Answer: Carbohydrates (carbo- = “carbon”; hydrate = “water”) contain the elements carbon, hydrogen, and oxygen, and only those elements with a few exceptions. The ratio of carbon to hydrogen to oxygen in carbohydrate molecules is 1:2:1.

HOPE THIS HELPS

CAN U GIVE ME BRAINLIEST

3 0
3 years ago
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