Answer: Option (c) is the correct answer.
Explanation:
It is known that like dissolves like. As cyclohexane is a hydrocarbon and we know that hydrocarbons are non-polar in nature. So, a non-polar compound will be soluble in a hydrocarbon.
For example, NaBr is an ionic compound and when it i added to liquid cyclohexane then it will not dissolve. Similarly, 
and HI are polar covalent compounds and they will not dissolve in liquid cyclohexane.
But 
is a non-polar compound. So, when it is added to liquid cyclohexane then it will readily dissolve.
Thus, we can conclude that pentane () will most likely dissolve in cyclohexane to form a solution.
Stoichiometry:
First, calculate the number of grams for one mole of Ca3 (PO3)4
(3 * (Mass of Ca)) + (4 * (Mass of P + (3 * Mass of Oxygen)))
= (3*40.08) + 4(30.97 + (3*16.00))
=(120.24) + 4(78.97)
=436.12 g / mol Ca3(PO3)4
This means there are 436.12 g per 1 mole of Ca(PO3)4. Since there are 4.50 moles of Calcium Phosphate, mulitply the molar mass of Ca(PO3)4 by 4.50 and you should get 1962.54 g. Since there are 3 sigfigs, the final answer is 1960 g.
on a side note: I put in all my work in case 1. your periodic table if different, 2. my work is wrong, 3. you put in the question wrong because I feel that the actual compound would be Ca3(PO4)3 instead of Ca3(PO3)4 (if this is the case, the answer should be 1820 g).
Answer:
I believe the answer is all amoeba come from other amoeba
When you drive your car, you use the gasoline to produce energy which exerts the oil thay was put into the car, would then from it into a cloud or puff of gas which pollutes the air, rises through the atmosphere, and eats away at the Ozone Layer.
The core is the layer of the sun from which energy escapes into space.
