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hoa [83]
4 years ago
12

satellites orbiting earth use solar cells as their source of electrical energy. why are solar cells ideal energy sources foe sat

ellites
Chemistry
1 answer:
Yanka [14]4 years ago
5 0
Solar cells are an ideal energy sources for satellites because they are always in contact of the sun's rays. 
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Chlorophyll a is one of the green pigments found in plants. Chlorophyll a has the molecular formula C55H72MgN4O5. How many atoms
frozen [14]
A-136 because 55+72+4+5=136.
8 0
4 years ago
Which of the following results in an increase in the entropy? (4 points)
Dima020 [189]

Dissolving sugar in water results in an increase in the entropy.

Hence, Option (D) is correct answer.

<h3>What is Entropy ?</h3>

Measurement of randomness of a system is called entropy. It is an extensive property. It is a state function. Unit of entropy is JK⁻¹ mol⁻¹.

Now lets check all options one by one

Option (A): Freezing water

Freezing water decreases the entropy because here second law of thermodynamics does not violate.

So it is incorrect option

Option (B): Cooling water

Cooling water does not increases entropy because entropy increases when solid melts to give liquid.

So it is incorrect option

Option (C): Condensing water vapour

In Condensing water vapour the temperature of liquid phase decreases and thus kinetic energy decreases. The randomness will decrease and hence entropy will also decrease.

So it is incorrect option.

Option (D): Dissolving sugar in solute

In dissolving sugar in solute the solid dissociates to ions and  the randomness will increase and hence entropy will also increase.

So it is correct option

Thus from the above conclusion we can say that Dissolving sugar in water results in an increase in the entropy.

Hence, Option (D) is correct answer.

Learn more about the Entropy here: brainly.com/question/1477087

#SPJ1

6 0
2 years ago
An experiment requires 42.5 g of sulfuric acid, which is easier to measure by volume than by mass what voliume should be measure
kodGreya [7K]

<span>Using proportions, if x is the unknown volume we have: 
1.84 / 1 = 42.5 / x </span>

<span>
Multiply both sides above by x: 
1.84*x / 1 = 42.5
1.84*x = 42.5 
Divide both sides by 1.84: 
x = 42.5 / 1.84</span>

<span>X = 23.10 mL</span>

5 0
3 years ago
Read 2 more answers
Hi All,
Novosadov [1.4K]

Answer:Combination.

Decomposition.

Single displacement.

Double displacement.

Combustion.

Redox.

Explanation:

4 0
3 years ago
What effect does observing a substance's physical properties have on the substance?
dybincka [34]
Depending on the testing process being used, it may affect the object by making it shape differently, scratch, it or sometimes do absolutely nothing.  hope this helps:)
5 0
3 years ago
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