Answer:
C
Explanation:
1. The molecule has to have a ratio of 1 hydrogen to 1 oxygen.
2. Hydrogen = 1amu, Oxygen = 16amu. (2*2)+(16*2) = 34amu
Answer:
Percent dissociated = 3.92%
Explanation:
The equilibrium of the weak acid, HA, is:
HA ⇄ H⁺ + A⁻
<em>Where Ka = 8x10⁻⁴ is: [H⁺] [A⁻] / [HA]</em>
<em> </em>
As both H⁺ and A⁻ comes from the same equilibrium we can write the concentrations of the species as follows:
[H⁺] = X
[A⁻] = X
[HA] = 0.50M - X
<em>Where X is reaction coordinate</em>
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Replacing:
8x10⁻⁴ = X² / 0.50-X
4x10⁻⁴ - 8x10⁻⁴X - X² = 0
Solving for X:
X = -0.02M. False solution. There is no negative concentrations
X = 0.0196M. Right solution.
Replacing:
[A⁻] = 0.0196M
Percent of the acid that is dissociated is:
[A⁻] / [HA]₀ * 100
<em>[HA]₀ is its initial concentration = 0.50M</em>
0.0196M / 0.50M * 100
<h3>Percent dissociated = 3.92%</h3>
the element first discovered in the sun is the element Helium. This noble gas is the second most abundant element in the universe and was discovered on the sun before it was discovered on the earth.
hope this helps :)
Convert grams to moles
moles to moles
moles to grams
A. 2.99g
b. 20.88g
sent a picture of the work. hope you see it