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3 years ago

What determines the amount of chemical energy a substance has?

1 answer:

6 0

Chemical energy is the kind of energy stored in the bonds formed by atoms and molecules in chemical compounds and elements. This energy is released during a chemical reaction and heat is often given out in the process. These kind of reactions where heat is given out as a by product are called exothermic reactions.

The major factor that determines how much chemical energy a substance has is the mass of that substance. Mass is defined as the amount of matter in a substance.

The higher the mass of a substance, the more concentrated that substance is and subsequently the greater the number of atoms and molecules.

Logically, the higher the number of atoms and molecules then the greater the number of bonds in that substance and subsequently the more the amount of chemical energy stored therein.

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Jet001 [13]

Answer:

B,C,F

Explanation:

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3 years ago

Devise a temperature scale, abbreviated g, for which the magnitude of the ideal gas constant is 1.00 j g–1 mol–1 .

melisa1 [442]

The value of ideal gas constant (R) in Joule is 8.314 Joule $Kelvin^{-1}$ $mol^{-1}$ . Now the given expression is 1.00 J. g $g^{-1}.mole^{-1}$ . Where the g represent the temperature. Thus the abbreviated g must have the value 8.314 to satisfy the original value. Thus the temperature scale will be 1 kelvin = 8.314 g. Now 1 kelvin = -272.15°C or in terms of abbreviation of g we can write -272.15 °C = 8.314g, or, 1°C = (-) $\frac{8.314}{272.15}=0.030$ g. Thus the temperature scale of the g scale is 1 kelvin (K) = 8.314g and 1°C = 0.030 g.

7 0

4 years ago

Read 2 more answers

How many molecules are in 165 grams g of carbon dioxide ?

KATRIN_1 [288]

Answer:

There are 2.258 x 10^24 molecules of CO2 in 165 grams of CO2.

Explanation:

First you have to calculate the molar mass of carbon dioxide ⇒ 44 grs/mol. Then,

44 grs ------------- 1 mol CO2

165 grs ------------ x = 3.75 moles of CO2.

Then, from Avogadros constant we have that there are 6.022 x 10^23 molecules in 1 mol. So,

1 mol CO2 ---------------- 6.022 x 10^23 molecules CO2

3.75 moles CO2-------- x = 2.258 x 10^24 molecules CO2.

There are 2.258 x 10^24 molecules CO2 in 165 grams of CO2.

3 0

3 years ago

What is the hydroxide ion concentration in an aqueous solution with a hydrogen ion concentration of

Schach [20]

[H+][OH-] = 1x10-14 = Kw (Memorize this relationship)
(2.70x10-2)[OH-] = 1x10-14
[OH-] = 1x10-14/2.70x10-2
[OH-] = 3.70x10-13 M (assuming you ignore the autoionization of H2O)

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3 years ago

Where can you find atoms

Papessa [141]

Atoms make up everything, so technically--everywhere.

4 0

3 years ago

Read 2 more answers