Answer:
.122 mols of KCl
Explanation:
<u>Read the explanation </u><u><em>while</em></u><u> looking at the picture.</u>
We star with 15g because it's wat they give us:
<u>15g of KCIO3 will cancel out with 123g of KCIO3</u> (molar mass)
~Grams of KCIO3 are canceled out.~
<u>That 123g of KCIO3 is the same as 1 mol of KCIO3</u>
Then we use mole to mole ratio:
<u>1 mol of KCIO3 equals 2 mols of KCIO3</u> -- 2 moles from the equation
The <u>2 mols of KCIO3 is equal to 2 mols of KCl</u> (from equation)
Multiply the numbers on top. Multiply the numbers on the bottom. Then divide. You get:
This sounds confusing. But the picture below is the format.
The SAME COLOR are the ones that cancel out.
Explanation:
Evirmental disruption because if they had stability then they would not need change. The other two don't make sense....I hope this helps
Answer:
Point source pollution:
If pollution comes from a fix source then is called point source pollution.It have a specific location where pollution comes.
Ex: Air pollution ,water pollution.
Non point source pollution:
If pollution comes from number of sources then is called point source pollution.This pollution does not have a specific point of source.
Ex: Spills ,leaks ,Sewage over flow etc.
Answer:
49.0g/mol is molar mass of X
Explanation:
<em>551mg of X are dissolved in 100g of benzonitrile</em>
<em>Freezing point of solution: -13.4°C</em>
The freezing point depression of a solution (Colligative property) follows the equation:
ΔT = Kf*m*i
<em>Where ΔT is change in freezing point from the pure solvent (Benzonitrile: -12.8°C) to the solution (-13.4°C)</em>
<em>Kf is freezing point depression of benzonitrile: 5.34°C/m</em>
m is molality of the solution (Moles X / kg of benzonitrile)
And i is Van't Hoff factor (1 for any solute in benzonitrile)
ΔT = -12.8°C - (-13.4°C) = 0.6°C
Solving for molality of the solution:
ΔT = Kf*m*i
0.6°C = 5.34°C/m*m*1
0.1124m = molality of the solution
Moles of X are:
0.1124mol/kg benzonitrile * 0.1kg benzonitrile = 0.01124 moles X
In 551mg = 0.551g:
Molar mass:
0.551g / 0.01124mol =
49.0g/mol is molar mass of X