A Calcium Hydride
Hydrogen Peroxide
Butene
A Lead Oxide
Hydrogen Peroxide is probably true most organic of the 4. I believe it is made in the liver, or some place in the body. Hydrocarbons and heavy metal compounds aren't organic, at all.
Answer:
mass (g) needed = 710.2 grams Na₂SO₄(s)
Explanation:
Needed is 2.5 Liters of 2.0M Na₂SO₄; formula wt Na₂SO₄ = 142.04g/mol.
mass (grams) of Na₂SO₄(s) = Molarity needed x Volume needed in Liters x Formula Wt of solute
mass (grams) of Na₂SO₄(s) = (2.5L)(2.0M)(142.04g/mol) = 710.2 grams Na₂SO₄(s)
Mixing: Transfer 710.4 grams Na₂SO₄ into mixing vessel and add water-solvent up to but not to exceed 2.5 Liters total volume. Mix until dissolved.
Gives 2.5 Liters of 2.0M Na₂SO₄(aq) solution.
Answer:
0.040M RbOH
Explanation:
The reaction of Rb with water is:
2Rb + 2H₂O → 2RbOH + H₂
As 2 moles of rubidium produce 2 moles of rubidium hydroxide, we need to find the moles of rubidium added. With these moles and the volume we can find molar concentration of RbOH as follows:
<em>Moles Rb = Moles RbOH -Molar mass Rb = 85.4678g)</em>
8.5g * (1mol / 85.4678g) = 0.099 moles RbOH
As 1dm³ = 1L, the volume in liters is 2.5L
That means molarity is:
0.099 moles RbOH / 2.5L =
<h3>0.040M RbOH</h3>
Answer: B
Explanation:
Cross contamination refers to the in unintentional transfer of bacteria or toxins from one individual or surface to another. The individual receiving or even the fellow giving out the cloth may be unaware of the risk involved in the transfer of such contaminated materials. Hence, the other individual is cross contaminated with the toxins originally carried by the individual wearing the cloth.
Answer: 0.3
Explanation:
We know that
Ka = [H+] * [A-] / [HA]
And the acid is 15 % dissociated means that
[A-] / [HA] *100 = 15%
So
[A-] / [HA] = 0.15
Then we know that [H+] = [A-] = 2 molar
Replacing we have
Ka = 2 molar * 0.15 = 0.3