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IgorC [24]
3 years ago
9

Which of the following best describes exothermic chemical reactions?​

Chemistry
1 answer:
zlopas [31]3 years ago
3 0
They always release heat
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And with solution...
Tems11 [23]

Answer:

The answer to your question is: V = 6.93 L

Explanation:

Data

N₂ = 5.6 g

Volume of NH₃ = ?

                              14 g of N   ----------------  1 mol

                              5.6 g -----------------------   x

                             x = (5.6 x 1) / 14 = 0.4 mol of N

Reaction

                                N₂    +     3H₂    ⇒    2NH₃

                                1 mol of N₂   ----------------  2 moles of NH₃

                                0.4 mol of N₂ --------------   x

                               x = (0.4 x 2) / 1

                               x = 0.8 mol of NH₃

Formula

                 PV = nRT

P = 5200 torr = 6.84 atm

V = ?

n = 0.8

R = 0.082 atm L/ mol °K

T = 450°C = 723°K

Substitution

                     V = (0.8)(0.082)(723) / 6.84

                     V = 6.93 L

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3 years ago
A car accelerates from rest to a speed of 24 m/s in 8 seconds. What is the car's average acceleration
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Answer:

3 m/s

Explanation:

24 m/s over 8 seconds would be 24/8 making it be 3 m/s avg

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2 years ago
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