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3 years ago

PLEASE HELP I NEED IT!!!!!

1 answer:

galina1969 [7]3 years ago

8 0

Answer:
Molarity = 2.3 M

Explanation:
Molarity can be calculated using the following rule:
Molarity = number of moles of solute / volume of solution

1- getting the number of moles:
We are given that:
mass of solute = 105.96 grams
From the periodic table:
atomic mass of carbon = 12 grams
atomic mass of hydrogen = 1 gram
atomic mass of oxygen = 16 grams
Therefore:
molar mass of C2H6O = 2(12) + 6(1) + 16 = 46 grams
Now, we can get the number of moles as follows:
number of moles = mass / molar mass = 105.96 / 46 = 2.3 moles

2- The volume of solution is given = 1 liter

3- getting the molarity:
molarity = number of moles of solute / volume of solution
molarity = 2.3 / 1
molarity = 2.3 M

Hope this helps :)

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Explanation:

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4 years ago

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Answer: The correct answer is A. Molality. It is the concentration expressed as moles of solute per kilogram solvent. It is most commonly used in solving problems involving Colligative Properties (e.g. boiling point elevation, freezing point depression). Other ways to express concentration are Molarity, Mole Fraction, Parts per Million, Parts per Billion, and Normality.

Further Explanation

B. Mole Fraction is the ratio of the moles of a solute to the total moles of the solution. This unit of concentration is expressed as:

$mole\ fraction \ of \ x = \frac{moles \ of \ solute \ x}{total\ moles \ of \ solution}$

C. Molarity is the most common ways of expressing concentration. It is the amount of solute per liter of solution and is expressed as:

$Molarity\ (M) \ = \frac{moles \ of \ solute}{liter \ of \ solutiont}$

D. ppm (or parts per million) is used for very dilute solutions. It is expressed as the mass of solute in milligrams per liter of the solution:

$parts\ per \ million \ (ppm) = \frac{mass\ of \ solute \ (in\ mg)}{liter\ of\ solution}$

Learn more

1. Learn more about Molarity brainly.com/question/9183916

2. Learn more about Colligative Properties brainly.com/question/1257312

3. Learn more about Solution brainly.com/question/7932885

Keywords: molarity, molality, mole fraction, parts per million

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3 years ago

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