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Zina [86]
3 years ago
9

The quantity of energy released or absorbed as heat during a chemical reaction is called the 28. a. temperature. c. entropy d. f

ree energy enthalpy of reaction.
Chemistry
1 answer:
Tatiana [17]3 years ago
5 0

Answer: enthalpy of reaction.

Explanation:

Temperature of the gas is defined as the degree of hotness or coldness of a body. It is expressed in units like ^0C and K

Entropy is the measure of randomness or disorder of a system. If a system moves from  an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

Free energy is the amount of energy that can be converted into useful work.

Enthalpy of the reaction is the difference between the energy of products and the energy of reactants. it is either the heat released or absorbed during the reaction. It is either positive or negative.

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Which describes radioactive decay of a substance? More of the radioactivity is lost during the first half-life than in later hal
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Answer:More of the radioactivity is lost during the first half-life than in later half-lives.

Explanation: Passed test with 98

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What is 3780 cal to kJ
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15815.52 kJ

Explanation:

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Calculate the Molarity (M) of an aqueous solution of HCl which is 35.38% HCl by mass and has a density of 1.161 g/mL.
kozerog [31]

Answer:

11.2 M → [HCl]

Explanation:

Solution density = Solution mass / Solution volume

35.38 % by mass, is the same to say 35.38 g of solute in 100 g of solution.

Let's determine the moles of our solute, HCl

35.38 g . 1 mol/36.45 g = 0.970 moles

Let's replace the data in solution density formula

1.161 g/mL = 100 g / Solution volume

Solution volume = 100 g / 1.161 g/mL → 86.1 mL

Let's convert the volume to L → 86.1 mL . 1L / 1000 mL = 0.0861 L

Molarity (M) → mol/L = 0.970 mol / 0.0861 L → 11.2 M

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3 years ago
A toy car rolls 8 meters in 2 seconds what is the average speed of the toy car​
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SCRIE FORMULA ŞI DENUMEŞTE SUBSTANŢA
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Answer:

raspunde in explicatie

Explanation:

În această întrebare, trebuie să scriem formula și să numim compusul.

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C. 1 atom de carbon și 2 atomi de oxigen CO2 Oxid de carbon (iv)

d. 1 atom de calciu și 1 carbonat de grupă Aceasta este CaCO3 Adică trioxocarbonatul de calciu iv

e. Pb (II) și un carbonat Aceasta este PbCO3 Acesta este carbonatul de plumb (ii)

f. Grupa de cobalt 2 și fosfați

adică

Co3(PO4)2

Cobalt (ii) tetraoxofosfat (v)

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