0.563 is a correct value of molar fraction of chloroform.
<u>Explanation:</u>
Mole fraction is a unit of concentration, defined to be equal to the number of moles of a component divided by the total number of moles of a solution. Because it is a ratio, mole fraction is a unit less expression. The mole fraction of all components of a solution, when added together, will equal 1.
Mole fraction is another way of expressing the concentration of a solution or mixture. It is equal to the moles of one component divided by the total moles in the solution or mixture. Mole fraction is used in a variety of calculations, but most notably for calculating partial pressures.
Tin and Hydrofluoric Acid reacts as shown,
<span> Sn + 2 HF </span>→ SnF₂<span> + H</span>₂
According to Equation,
40.02 g (2 Moles) HF Required = <span>1 Mole of Sn for complete Reaction
So,
40 g of HF will require = X Moles of Sn
Solving for X,
X = (40 g </span>× 1 Mole) ÷ 40.02 g
X = 0.999 Moles ≈ 1 Mole
Result:
40 g of HF requires 1 Mole of Tin (Sn) for complete Reaction to produce SnF₂ and H₂.
The answer you're looking for is "-18h^2 + 85h - 18".
This can be found by distributing "9h" into "(-2h + 9). This should give you "-18h^2 + 81h". Then youd distribute "-2" into the same parenthesis, which will give you "4h - 18".
Together, you would have "-18h^2 + 81h + 4h - 18". Combine like terms (81h and 4h), and you'll get the answer of "-18h^2 + 85h - 18".
I hope this helps!!
