Molality is the number of moles dissolved in one kilogram of solvent.
m = n/kg of solvent
n = mass of solute / molar mass of solute
Acetone's chemical formula is C3H6O. Therefore, its molar mass = 12*3 + 6*1 + 1*16 = 58g = 0.058kg
n = mass of solute / 0.058
We have the molality = 0.7500 and the mass of solution = mass of solvent + mass of solute = 450 g = 0.45 kg
Therfore, mass of solvet = 0.45 - mass of solute
0.75 = n / 0.45 - mass of solute
0.75 = (mass of solute / 0.058) / (0.45 - mass of solute)
Let mass of solute = x
0.75 = (x/0.058) / (0.45 - x)
0.3375 - 0.75x = x/0.058
x = 0.019575 - 0.0435x
1.0435x = 0.019575
x = 0.01875 kg
mass of acetone = 0.01875 kg = 18.75 grams
Answer:
Explanation:
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In this case, since nitrogen diatomic gas is a molecule that has the following molar mass:
Thus, since we have two moles of this molecule, we can compute the referred mass as shown below:
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It is false that if a question is asking about an opinion, it can be answered with science.
<h3>What is opinion?</h3>
A personal belief or assumed that is not tested or backed up by evidence is described as an opinion.
A hypothesis is typically a claim based on some form of observation or evidence. Hypotheses must be testable and, once tested, evidence-supported.
Any question that is based on opinion cannot be answered by scientific reasonings as it is not evidence based.
Thus, the given statement is false.
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The correct answer is species
