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3 years ago

CAN SOMEONE PLEASE ANSWER THIS PAGE ILL GIVE YOU ALL MY POINTS

Chemistry

1 answer:

iris [78.8K]3 years ago

6 0

Answer: the equation for the reaction is NH4Cl (s) --> NH3 (g) + HCl (g)

equation for heat reaction:

ΔH25° = (ΔH25° NH3 + ΔH25° HCl) - ΔH25° NH4Cl)

question 2:

the 1st and 3rd reactions are better ontained through refrence sources and the 2nd and 4th are the easiest and safest to measure in the laboratory. The 1st and rd reaction contains noxious gases this is because there is a (g) in both of the reactions. And the 2nd and 4th does NOT contain noxious gases so i assume its the safest to measure out in the lab

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3 years ago

How many moles of co2 are there in a 50.0 dm3 sample of the gas at a pressure of 100.0 kpa and a temperature of 50°c?

Rudiy27

Answer:

609 mol

Explanation:

1) Data:

a) n = ?

b) V = 50.0 dm³ = 50.0 liter

c) p = 100.0 kPa

d) T = 50 °C

2) Physical law:

Ideal gas law: pV = nRT,

3) Constants:

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4) Unit conversions:

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5) Solution:

pV = nRT ⇒ n = pV / (RT)

n = 0.9869 atm × 50.0 liter / (0.08206 atm-liter /K-mol × 323.15 K)

n = 609 mol ← answer

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