Answer:
Correct option would be A. Mg(s) → Mg2+ + 2e-
Explanation:
Marked as correct answer on Quiz ;) (A P E X)
Explanation:
If the density of the object is more than that of water, it will sink. Otherwise it will float. The density of water is 1 g/mL.
Substance 1,
Mass, m = 450 g, Volume, V = 90 mL
Density = mass/volume
So,

It will sink.
Substance 2,
Mass, m = 35 g, Volume, V = 70 mL
Density = mass/volume
So,

It will float.
Substance 3,
Mass, m = 24 g, Volume, V = 12 mL
Density = mass/volume
So,

It will sink.
Physical change is the change we can see with our eyes. Chemical change is the change that we cannot see. Examples: physical change: The Polar ice caps are melting, and we can see that as it happens. Chemical change: The cooking of an egg or some combustion, like a fire. We can't see the chemicals coming from the fire, but there are chemicals coming from what is being burned and is being released into the air that we cannot see.
The molar solubility of AgCl:
The molar solubility of AgCl in a 0.050 M NaCl solution is 8 x
M 
What is solubility?
The solubility is the quantity of reagent required to saturate the solution or bring about the dissociation reaction's equilibrium.
Reaction:
The dissociation reaction of AgCl in water is:
⇄ 
Each mole of AgCl that dissolves in this reaction yields 1 mole of both
and
. The concentration of either the Ag or Cl ions would then be equal to the solubility.
Solubility= [
] = [
]
Calculation:
in 0.050 M NaCl, the [
] = 1 x 
ksp = [
] x [
]
1.6 x
= [
] x ( 5 x
)
[
] = 5 x
x 1.6 x 
[
] = 5 x 1.6 x 
[
] = 8 x
M
Learn more about molar solubility here,
brainly.com/question/13202097
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