Normally, cortisol is present in the body at higher levels in the morning, and at it is lowest at night. Although stress isn’t the only reason that cortisol is secreted into the bloodstream, it has been termed “the stress hormone” because it’s also secreted in higher levels during the body’s stress response and is responsible for several stress-related changes in the body.
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
The phase in which water molecules form crystal lattice is : B. Freezing
When water undergone a freezing phase, it will trapped a specific amount of Gases inside it. Crystal lattice is basically the gas molecule that trapped within the water
hope this helps
Answer:
C. The equation violates the Law of Conservation of Mass
Explanation:
This equation is invalid because it violated the Law of conservation of Mass. The correct option is C.
This law establishes that the mass is not preserved or destroyed, but transformed.
That is why in a chemical reaction, the number of atoms involved in the reagents and products must be equal.
to achieve this it is necessary to perform a reaction adjustment.
The correct equation would be:
⇄ 
