Reaction of Copper with Mercuric Nitrate is as follow,
Cu + Hg(NO₃)₂ → Cu(NO₃)₂ + Hg
According to equation,
1 Mole of Cu reacts to form = 1 Mole of Hg
So,
1.20 Moles of Cu will react to produce = X Moles of Hg
Solving for X,
X = (1.20 mol × 1 mol) ÷ 1 mol
X = 1.20 mol of Hg
Result:
1.20 mole of Cu when reacted with mercuric nitrate produces 1.20 moles of Hg.
The mass of chlorine gas is calculated as follows
find the moles HCl , At STP 1moles = 22.4 liters
what about 174 L
moles = 174l x 1mole/22.4L= 7.77 moles
write the equation for reaction
H2 + Cl2 =2HCl
by
use of mole ratio between cl2 to HCl (1:2) the moles of Cl2 =7.77/2 = 3.885 moles
mass is therefore = 3.885 mol x 71 gmol = 275.84 grams
Despite its appearance, air has a ‘thickness’ so when the sun is high in the sky the light travels through the air on a very much shorter path than when it is low on the horizon.
Imagine that air water and you are below the surface, the light from an overhead sun will be quite sharp and bright, but if lower in the sky it will have to travel through much more water to reach you, so will look less bright and sharp. It ma not seem the same, but the atmosphere is just like very thin water, and a low lying sun will be drastically reduced in strength, so all you will see is a sun with a shift to the red end of the spectrum as all the actinic part will be filtered away by that thicker atmosphere.
Answer:
Molarity of solution is 0.0049 M
Explanation:
Molarity of a solution is the ratio of number of moles of solute to volume of solution in Liter
Number of moles is the ratio of mass to molecular weight of a compound.
Here 
is the solute.
448 mg of = 0.448 g of
So, 0.448 g of = 
moles of = 0.00245 moles of
Total volume of solution = 500 mL = 0.5 L
So, molarity of solution = 
2OH is the molecular formula and the imperial cal formula is OH.
