Answer:
The answer to your question is 22.4 g of Ca(NO₃)₂
Explanation:
Data
mass of Ca(NO₃)₂ = ?
mass of water = 726 g
concentration = 0.2 m
Process
In Chemistry, there are two main units of concentration Molarity (M) and Molality (m). In this problem concentration is "m" then I will calculate molality.
1) Formula
molality = moles / mass of solvent
2.- Solve for moles
moles = molality x mass of solvent
-Substitution
moles = (0.2) x (0.726)
-Simplification
moles = 0.1452
3.- Convert moles to grams
Molar mass of Ca(NO₃)₂ = 40 + (14 x 2) + (6 x 16)
= 40 + 18 + 96
= 154 g
154 g of Ca(NO₃)₂ ---------------- 1 mol
x ---------------- 0.1452 moles
x = (0.1452 x 154) / 1
x = 22.4 g of Ca(NO₃)₂
Answer:
She did no work while she posed because she did not move the torch or the book.
Explanation:
Answer:
The reason is because Charle's Law which states that volume is directly proportional to temperature. So, for the temperature to be absolute zero, there would need to be no volume. It's Impossible.
Explanation:
Answer:
young plains called maria and are composed of basalt
Explanation:
Answer:
Solutions from highest to lowest freezing point:
0.040 m glycerin = 0.020 m potassium bromide > 0.030 m phenol
Explanation:
= Depression in freezing point
i = van'T Hoff fcator
= Molal depression constant of solvent
m = molality of the solution
Higher the value of depression in freezing point at lower will be freezing temperature the solution.
1. 0.040 m glycerin
Molal depression constant of water = 
i = 1 ( organic molecule)
m = 0.040 m
2. 0.020 m potassium bromide
Molal depression constant of water =
i = 2 (ionic)
m = 0.020 m
3. 0.030 m phenol
Molal depression constant of water =
i = 1 (organic)
m = 0.030 m
Solutions from highest to lowest freezing point:
0.040 m glycerin = 0.020 m potassium bromide > 0.030 m phenol
