Answer:
1.16 mol
Explanation:
Given data:
Mass in gram Mg(OH)₂ = 68 g
Number of moles of Mg(OH)₂ = ?
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of Mg(OH)₂ = 58.32 g/mol
By putting values,
Number of moles = 68 g/ 58.32 g/mol
Number of moles = 1.16 mol
Answer:
Unit cells which are present per cubic centimeter of Ag = 
Volume = 
Edge length = 
Explanation:
(a)
Given that:-
The density of the solid Ag = 10.5 g/cm³
Molar mass of silver = 107.8682 g/mol
So, Moles present per cm³ of Ag = 
=0.0973 mol/cm³
Also, 1 mole = 
atoms.
So,
Atoms present per cm³ of Ag = 
Thus, answer = 
In FCC, the number of atoms in the unit cell = 4 unit cells
So,
Unit cells which are present per cubic centimeter of Ag = 
<u>Unit cells which are present per cubic centimeter of Ag = </u>
(b)
The reciprocal of the unit cell/cm³ is the volume of the unit cell.
So, 
<u>Volume = </u>
(c)
Also, Volume = 
Thus, edge length = 
= 
<u>Edge length = </u>
so basically
some fuels have an impurity in them which is sulfur.
When the fuel undergoes combustion, the sulfur reacts with oxygen in the air to form sulfur dioxide.
the sulfur dioxide reacts with water vapour in the air to form sulfurous acid, which is a type of acid rain.
Also
the high pressures inside a car engine may cause nitrogen and oxygen in the air to react and form oxides of nitrogen. the most common compounds formed inside car engines are NO (nitrogen oxide) and NO2 (nitrogen dioxide)
Answer:
Transfer of Heat
You might have observed that a frying pan becomes hot when kept on a flame. It is because the heat passes from the flame to the utensil. When the pan is removed from the fire, it slowly cools down. Why does it cool down? The heat is transferred from the pan to the surroundings. So you can understand that in both cases, the heat flows from a hotter object to a colder object. In fact, in all cases heat flows from a hotter object to a colder object.
Explanation:
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