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Lubov Fominskaja [6]
2 years ago
10

The Olympian swam 200 meters in 20 seconds. 1) velocity 2) acceleration 3) speed

Chemistry
2 answers:
KonstantinChe [14]2 years ago
5 0
The answer is 3) Speed.
Velocity describes speed and direction.
Accelerate is an increase of rate and speed
irakobra [83]2 years ago
3 0

Answer: velocity

Explanation:

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Consider the reaction.
Alekssandra [29.7K]

Answer:The correct answer is option C.

Explanation:

N_2(g)+3H_2(g)\rightarrow 2NH_3(g)

At STP, 1 mol of gas occupies 22.4 L of volume

So, 100.0 L volume of NH_3will be occupied by :

\frac{1}{22.4 L}\times 100.0 L=4.4642 moles

According to reaction 2 moles NH_3 are obtained from 1 mole of N_2.

Then,4.4642 moles of NH_3 will be obtained from :

\frac{1}{2}\times 4.4642 that is 2.2321 moles of N_2

Mass of N_2 gas:

Moles of N_2 gas  Molar mass of N_2 gas:

2.2321 mol\times 28 g/mol=62.4988\approx 62.50 g

Hence, the correct answer is option C.

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Answer:

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Why do we use the mole concept ??
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Answer:

Here

Explanation:

Chemists need the mole concept to bridge the gap between the microscopic world of atoms to the macroscopic world of humans. As you know, the molecular level consists of particles that are invisible to us.

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Which of the following is an irreversible physical change?
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