Answer:
25000 ppm
Explanation:
<em>Parts Per Million </em>is defined as the number of parts of a solute per one million parts of a solution.
ppm = (Weight of Solute / Weight of Solution) × 10⁶ ---(1)
Let us suppose that the air (solution) weights 100 grams, then 2.5 % of water vapors will have following mass,
Mass of Vapors g / 100 g × 100 = 2.5
Or,
Mass of Vapors = 2.5 × 100 / 100
Mass of Vapors = 2.5 g
Hence, mass of water vapors is 2.5 g.
Now, putting mass of water vapors and air in eq. 1,
ppm = (2.5 / 100) × 10⁶
ppm = 25000
Answer:
mass of Cu = 26,34615g
Explanation:
The equation for reaction is
Cu + 2 AgNO3 ---> Cu(NO3)2 + 2 Ag
1mol 2mol 1mol 2mol
mass of Ag that reacted = 89.5g
molar mass of Ag =107.86h/mol
number of moles = mass/molar mass
number of moles of Ag = 89.5/107.86
=0.8298moles
from the stoichoimetric relation;
1mol of Cu reacted to produce 2moles of Ag;
hence 0.8298moles of Ag produce would require; 0.8298/2 moles of Cu to react
=0.4149moles of Cu
mass of Cu = moles of Cu * molar mass of Cu
molar mass(Cu) = 63.5g
mass of Cu = 0.4149 * 63.5
mass of Cu = 26,34615g
Answer: nucleus
Explanation: the bigger the nucleus there more reactive the atom is
