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Vladimir79 [104]
1 year ago
12

The energy changes in chemical reactions occurs when atoms _____ to form new substances.

Chemistry
1 answer:
Zanzabum1 year ago
8 0

A chemical reaction is marked by new substance formation. The energy changes in chemical reactions occur when atoms <u>rearrange</u> to form new substances.

<h3>What is a chemical reaction?</h3>

A chemical reaction is said to be the process that is characterized by the formation of new substances by the alteration of the chemical composition and the properties of the compound or the molecule.

The reaction results in a new product by the rearrangement of the atoms of the reactant molecule by breaking and creating chemical bonds. The bonds are altered by the change in energy.

Therefore, <u>rearrangement </u>is the correct blank.

Learn more about chemical reactions, here:

brainly.com/question/26690612

#SPJ4

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If the tropospheric concentrations of OH and CF3CH2F are 8.1×105 and 6.3×108 molecules/cm3, respectively, what is the rate of re
mel-nik [20]

Answer:

2.3*10^-19 M/s

Explanation:

Generally, reaction rate is the product of the rate constant, and the concentrations of the reactants in the system. Therefore, the rate of the reaction can be expressed as:

rate = k*[CF_{3}CH_{2}F][OH]

The value of the rate constant k is 1.6*10^8 [1/(M*s)] at the given temperature.

[CF_{3}CH_{2}F] = 6.3*10^8 molecules/cm^3

[OH] = 8.1*10^5 molecules/cm^3.

However, we need to convert to mol/(L(M). Therefore:

6.3*10^8 *(1000/6.023*10^23) = 1.05*10^-12

8.1*10^5 molecules/cm^3 *(1000/6.023*10^23) = 1.3*10^-15

Thus:

rate =k*[CF_{3}CH_{2}F][OH] = 1.6*10^8* 1.05*10^-12* 1.3*10^-15 =2.3*10^-19 M/s

8 0
3 years ago
I need to know the measurements of this to the appropriate amount of significant figures
Vesnalui [34]

Answer:

[See Below]

Explanation:

140 ml.

3 0
3 years ago
PLSS HELP I GIVE BRAINLIEST
STatiana [176]
What the first person said lol
5 0
3 years ago
. An inflated balloon has a volume of 6.0 L at sea level (1.0 atm) and is allowed to ascend in altitude until the pressure is 0.
Tju [1.3M]

Answer:

The answer to your question is Volume = 11.4 L

Explanation:

Data

Volume 1 = V1 = 6 L

Pressure 1 = P1 = 1 atm

Temperature 1 = T1 = 22°C

Volume 2 = V2 = ?

Pressure 2 = 0.45 atm

Temperature 2 = -21°C

Process

1.- Convert temperature (°C) to °K

T1 = 273 + 22 = 295°K

T2 = 273 + (-21) = 252°K

2.- Use the combined gas law to solve this problem

                   P1V1 / T1 = P2V2 / T2

-Solve for V2

                   V2 = P1V1T2 / T1P2

-Substitution

                   V2 = (6)(1)(252) / (295)(0.45)

- Simplification

                   V2 = 1512 / 132.75

- Result

                   V2 = 11.38 L

3 0
3 years ago
Which is a resource that the National Park Service manages?
pantera1 [17]

Answer:

to preserve the integrity of the wildlife refuge, ecosystems and the endangered species.

Explanation:

A national park service manages

4 0
2 years ago
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