Answer:
subscripts show the number of atoms of each type in the molecule.
•3.9g of ammonia
•molar mass of ammonia = 17.03g/mol
1st you have to covert grams to moles by dividing the mass of ammonia with the molar mass:
(3.9 g)/ (17.03g/mol) = 0.22900763mols
Then convert the moles to molecules by multiplying it with Avogadro’s number:
Avogadro’s number: 6.022 x 10^23
0.22900763mols x (6.022 x 10^23 molecs/mol)
= 1.38 x 10^23 molecules
The volume of the gas when the container is cooled from a temperature of 300 K to 200 K is 0.83 L
<h3>Charles' law </h3>
Charles' law states as follow:
V₁ / T₁ = V₂ / T₂
Where
- V₁ is the initial volume
- T₁ is the initial temperature
- V₂ is the new volume
- T₂ is the new temperature
<h3>How to determine the new volume </h3>
From the question given above, the following data were obtained
- Initial volume (V₁) = 1.25 L
- Initial temperature (T₁) = 300 K
- New temperature (T₂) = 200 K
V₁ / T₁ = V₂ / T₂
1.25 / 300 = V₂ / 200
Cross multiply
300 × V₂ = 1.25 × 200
Divide both side by 300
V₂ = (1.25 × 200) / 300
V₂ = 0.83 L
Learn more about gas laws:
brainly.com/question/6844441