Answer:
Magnesium hydroxide, Mg(OH)2, is an Arrhenius base and therefore also a Brønsted-Lowry base.
However, water can also act as a base by accepting a proton from an acid to become its conjugate base, H3O+. where Al(OH)3 is acting as a Lewis Base.
Explanation:
Arrhenius acids and bases
An Arrhenius acid is any species that increases the concentration of H+start text, H, end text, start superscript, plus, end superscript in aqueous solution.
An Arrhenius base is any species that increases the concentration of OH−start text, O, H, end text, start superscript, minus, end superscript in aqueous solution.
Answer : The concentration to a mole fraction in parts per billion (ppb) is, 350 ppb
Explanation :
As we are given that the concentration of chloroform is, 
.
Now we have to convert it into parts per billion (ppb).
As we know that,
and,
So,
Thus, the concentration to a mole fraction in parts per billion (ppb) is, 350 ppb
The number of students is your independent variable
Molar mass of ethanol is: 46 grams/moles
C2H6O-> 2x12 + 6x1+ 16x1 (see periodic table)
If 46 g correspond to 1 mol, how much moles correspond 35 g?
46g ====1mol
35g====x
x= 35/46
x=0,76 mol
-1367 kj/mol, means that there are -1367 kj in one mol
1mol ==== -1367 kj
0,76mol==== x
x=- 1040Kj
Ethanol released 1040 Kj.
