Pure air is a mixture of several gases that are invisible and odorless. Consists of 78% nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide.
If these answers are not the one, don't go off on me because I'm trying my best :
1. A
2. A
3. C
Answer: Refraction is the answer because the spoon in the water is seen to be bent in the medium(water) and moving at a different speed.
Answer: 7 milimoles of dissolve in 1 litre water.
Explanation:
Given: gas is passed through water at 293K.
Assumption : exerts a partial pressure of 0.987 bar.
Take : Henry's constant = 76.8 Kbar
To find : Number of moles of gas dissolve in 1 litre water.
According to Henry's law,
moles in 1 liter of water =
Let n= moles of nitrogen
Total moles = 55.56+n
So,
Hence, 7 milimoles of dissolve in 1 litre water.
Answer:
1.04 moles of AlCl₃
Explanation:
Balanced Equation: 2Al°(s) + 3Cl₂(g) => 2AlCl₃(s)
Approach => convert given data (28 g Al°) to moles. The number of moles AlCl₃ would equal the number of moles aluminum because coefficients for Aluminum and Aluminum Chloride are equal.
moles Al° = (28g)/(27g/mole ) = 1.04 mole Al°
From balanced equation moles AlCl₃ produced equals moles of Al° produced = 1.04 mole AlCl₃ because coefficients of Al° & AlCl₃.