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3 years ago

How many moles are in 153 grams of O2?

Chemistry

1 answer:

Tatiana [17]3 years ago

8 0

Answer:

4.78 mol O2

Explanation:

Grams --> moles

Grams/molar mass = moles

153 g O2 / 32 g/mol O2 = 4.78125 (significant figures so round it up; the grams has 3 significant figures, so round it up) 4.78 mol O2

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So the dissolution equation of NaI is:
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3 years ago

Given the equation representing a reaction:H2(g) + I2(g) → 2HI(g)Which statement describes the energy changesthat occur in this

Korvikt [17]

The given question is incorrect, here is a complete question.

Given the equation representing a reaction:

$H_2(g)+I_2(g)\rightarrow 2HI(g)+Energy$

Which statement describes the energy changes that occur in this reaction?

(1) Energy is absorbed as bonds are formed, only.

(2) Energy is released as bonds are broken, only.

(3) Energy is absorbed as bonds are broken, and energy is released as bonds are formed.

(4) Energy is absorbed as bonds are formed, and energy is released as bonds are broken.

Answer : The correct option is, (3) Energy is absorbed as bonds are broken, and energy is released as bonds are formed.

Explanation :

Bond energy : It is defined as the amount of energy required to break a molecules into its component atoms.

At the time of bond formation, the energy is released and at the time of bond breaking, the energy is absorbed.

In the chemical reaction, when the energy is shown in product side that means the energy is released.

In the chemical reaction, when the energy is shown in reactant side that means the energy is absorbed.

Hence, the correct option is, (3)

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Answer:

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Explanation:

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Answer:

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Explanation:

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