Answer:
Number of moles of nitrogen produced from 167.7 g of sodium azide are 3.87.
Explanation:
Given data:
Mass of sodium azide = 167.7 g
Moles of nitrogen gas produced = ?
Solution:
First of all we will write the balance chemical equation of decomposition of sodium azide.
Chemical equation:
2NaN₃ → 3N₂ + 2Na
Number of moles of sodium azide:
Number of moles of sodium azide = mass / molar mass
Number of moles of sodium azide = 167.7 g/ 65 g/mol
Number of moles of sodium azide = 2.58 mol
Now we compare the moles of sodium azide with nitrogen from balance chemical equation.
NaN₃ : N₂
2 : 3
2.58 : 3/2×2.58 = 3.87
Number of moles of nitrogen produced from 167.7 g of sodium azide are 3.87.
Mass of nitrogen produced = moles × molar mass
Mass of nitrogen produced = 3.87 mol × 14 g/mol
Mass of nitrogen produced = 54.18 g.
0 J
Work = Force * Displacement
Since displacement is 0 m (object isn't moving), work would also be 0.
Answer:
60 Miles per Hour
Explanation:
You included no scenario so I will develop a hypothetical that you can reference.
Assuming a car traveled a distance of 450 miles from one place to another in 9 hours with the car travelling 180 of those miles between 6 hours and 9 hours, what was the average speed between those 6 and 9 hours.
The car travelled 180 miles in 6hours - 9 hours. First find out how many hours this is:
= 9 - 6
= 3 hours
Speed = Distance / Time
= 180 / 3 hours
= 60 miles per hour
Answer:
160 g of NaOH
Explanation:
Reaction: 2NaOH + H₂SO₄ = Na₂SO₄ + 2H₂O
When a base and an acid react, the produce water and a salt. → Neutralization
In this reaction 2 moles of hydroxide need 1 mol of sulfuric acid to react, it is the same to say that 1 mol of sulfuric acid needs 2 moles of NaOH to react. We convert the mass of sulfuric to moles and we propose the rule of three:
196 g / 98 g/mol = 2 moles
1 mol of sulfuric acid needs 2 moles of NaOH to react
Then 2 moles of sulfuric acid will react with (2 . 2) /1 = 4 moles of NaOH
We convert the moles of base to grams → 4 mol . 40 g /1mol = 160 g
