Answer:
Here's what I find
Explanation:
You don't use ΔHfus. You use ΔHvap
There are some preliminary calculations:
- Use the density of the liquid to calculate its mass.
- Use the molar mass to calculate the moles (n)
The formula for the heat (q) absorbed during vaporization is
q = nΔHvap
Insert your numbers into the formula, do the calculation, and you have the answer.
Answer:
The molarity of this KOH solutions 3.21 mol / L (option C is correct)
Explanation:
Step 1: Data given
Mass of KOH = 45.0 grams
Molar mass of KOH = 56.1 g/mol
Volume = 250.0 mL = 0.250 L
Step 2: Calculate moles KOH
Moles KOH = mass KOH / molar mass KOH
Moles KOH = 45.0 grams / 56.1 g/mol
Moles KOH = 0.802 moles
Step 3: Calculate molarity
Molarity KOH solution = moles KOH / volume water
Molarity KOH solution = 0.802 moles / 0.250 L
Molarity KOH solution = 3.21 mol / L
The molarity of this KOH solutions 3.21 mol / L (option C is correct)
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Answer:
xy (-b+c+q) is the answer to this