CHEMISTRY HIGH SCHOOL

When the Sun’s radiant energy falls on Earth’s oceans, it causes water to change state by evaporating. Which form of energy does water vapor have?

Answers

Answer 1
Answer:

Answer:

The correct answer is chemical potential energy.

Explanation:

When the radiation energy of the Sun falls on the surface of the oceans, it makes the water to modify its state by undergoing evaporation. The form of energy exhibited by the water vapor is chemical potential energy.  

When the energy from the Sun falls on the surface of the water, a change in the state takes place, that is, from liquid to gas. This gas elevates above in the form of water vapor, and this is a chemical change. This vapor possesses the tendency to get transformed into other forms. Thus, the energy present within the water vapor is known as chemical potential energy.  
Answer 2
Answer: Water vapor possesses latent energy. this form of heat energy is the force that drives the water cycle in nature.

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Which of the following is a homogeneous mixture?a. iced tea
b. apple pie
c. orange juice
d. vegetable soup User: A group of students want to identify a sample of matter. They observed the sample and made the observations below. • There are various components in the sample. • Different regions of the sample have different properties. Based on these observations, how will the students classify the matter?
a. heterogeneous mixture
b. homogeneous mixture
c. chemical ...

Answers

The answer for the first question is A. Iced Tea and C. Orange Juice. The answer for the second question is A. Heterogeneous mixture

A homogeneous mixture is a combination of 2 or more substances wherein its concentration is evenly distributed throughout the mixture. This means that you cannot identify the different components or properties of the mixture. A heterogeneous mixture, on the other hand, is a combination of 2 or more substances wherein its components are unevenly distributed. This means that its components can visibly be identified from each other.

Hydrogen chloride, HCl, is classified as an Arrhenius acid because it produces(1) H+ ions in aqueous solution(2) Cl– ions in aqueous solution(3) OH– ions in aqueous solution(4) NH4+ ions in aqueous solution

Answers

Answer: (1) H+ ions in aqueous solution

Digestion breaks down _____into simpler substances that your body can use for raw materials and energy

Answers

The perfect word to fill the blank is carbohydrates. Digestion breaks down carbohydrates into simpler substances that your body can use for raw materials and energy. Carbohydrates are from the food we eat and are used in the body to produce and supply energy.

The atomic weight of an unknown element, in atomic units (amu), is approximately 20% less than that of calcium, the atomic weight of calcium is 40 amu. Which of the following best approximates the atomic weight, in amu, of the unknown element? (a) 8 (b) 20 (c) 32 (d) 48

Answers

a) 8

40*20%

=40*20/100

=800/100

=8

Final answer:

The atomic weight of the unknown element, which is approximately 20% less than calcium (40 amu), is estimated to be 32 amu.

Explanation:

The atomic weight of an unknown element is said to be approximately 20% less than that of calcium, which has an atomic weight of 40 atomic mass units (amu). To calculate the approximate atomic weight of the unknown element, take 20% of 40 (which is 8) and subtract it from 40. The result is 32 amu (40 - 8 = 32), so the correct answer is (c) 32.

Learn more about Atomic Weight here:

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A chemist dilutes a 1.0 mL sample of 2.0 M KNO3 by adding water to it. If the concentration of the solution that is obtained is 0.0080 M, what is its volume?Use: Mi Vi = Mf Vf

A.) 125 mL
B.) 250 mL
C.) 500 mL
D.) 2,000 mL

Answers

Mi = 2.0 M

Vi = 1.0 mL

Mf = 0.0080 M

Vf = ?

Mi * Vi = Mf* Vf

2.0 * 1.0 = 0.0080 * Vf

2 = 0.0080* Vf

Vf = 2 / 0.0080

Vf = 250 mL

answer b

hope this helps!.

Answer: Option (B) is the correct answer.

Explanation:

The given data is as follows.

              M_(1) = 2.0 M,           V_(1) = 1.0 ml

              M_(2) = 0.008 M,         V_(2) = ?

Therefore, calculate the volume of given solution as follows.

              M_(1) * V_(1) = M_(2) * V_(2)

Now, putting the given values into the above formula as follows.

            M_(1) * V_(1) = M_(2) * V_(2)

            2.0 M * 1.0 ml = 0.008 M * V_(2)    

                   V_(1) = 250 ml

Therefore, volume of the solution obtained is 250 ml.

A student increases the temperature of a 200 cm3 balloon from 60⁰C to 180⁰C. What should the new volume of the balloon be? Use the formula: V2 = (V1 T2)/T1Question 3 options:

100 cm3


236 cm3


272 cm3


600 cm3

Answers

According to Charle's law, the new volume of the balloon will be 600 cm³ if pressure is kept constant.

What is Charle's law?

Charles law is an experimental gas law which provides description about the behavior of gases which tend to expand on heating.It states that, at constant pressure, the temperature is in direct proportion with the volume that is,V∝T or V₁/T₁=V₂/T₂.The relation between volume and temperature is linear as the temperature increases volume also increases.

The graph of volume versus temperature is a straight line passing through the origin.The law was proposed by Jacques Charles in relation to ideal gases.

Substitution of the given values in the given formula, V₂= 200×180/60= 600 cm³.

Thus, the new volume of the balloon will be 600 cm³ if pressure is kept constant.

Learn more about Charle's law,here:

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Let x represent the new volume:

(200)/(60) =(x)/(180)

cross multiply:

(36,000)/(60x)

then simplify to get 600cm^3

Hope this helps :)
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