1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
strojnjashka [21]
3 years ago
7

A solution is made from ethanol, C2H5OH and water is 0.75 m. How many grams of ethanol are contained per 250. g of water?

Chemistry
1 answer:
kumpel [21]3 years ago
8 0

Answer:

m_{solute}=8.6g

Explanation:

Hello,

In this case, the unit of concentration is molality which is defined by:

m=\frac{n_{solute}}{m_{solvent}}

Whereas the mass of the solvent is measured in kilograms. In such a way, with the given data, we first compute the kilograms of water:

m_{solvent}=250g*\frac{1kg}{1000g} =0.25kg

Then, we solve for the moles of the solute:

n_{solute}=0.75\frac{mol}{kg}*0.25kg =0.19mol

Finally since the molar mass of ethanol is 46 g/mol, we compute the grams for the given solution:

m_{solute}=0.19*\frac{46g}{1mol} \\\\m_{solute}=8.6g

Best regards.

You might be interested in
How do I write 0.03438 m in scientific notation using 3 digits?
Law Incorporation [45]
3.44x10^2
you move the decimal over to get a single digit number with change. The number of times you move the decimal is the number for the 10 power
4 0
3 years ago
This is a type of element that has many valence electrons, not a conductor.
cestrela7 [59]
What is the question
3 0
3 years ago
Which of the following is a nonrenewable resource?
maks197457 [2]

Answer:

I think the answer is A!!!

3 0
3 years ago
Read 2 more answers
Water a combination of the elements hydrogen and oxygen, is an example of an
marin [14]

Answer:

Explanation:

Common Examples of the Law of Definite Proportions

Water, written as the chemical compound H20, is made up of atoms of hydrogen and oxygen. If one oxygen atom is combined with two hydrogen atoms, water is created.

3 0
3 years ago
The model below shows the equation that represents how hydrogen and oxygen combine to form water. In this chemical reaction, the
Effectus [21]

Answer:

true

Explanation:

because they are balance

5 0
2 years ago
Other questions:
  • rite stepwise equations for protonation or deprotonation of this polyprotic species in water. What are the products of the first
    12·1 answer
  • Please help!
    12·1 answer
  • Biomes are defined by specific characteristics. What characteristics would define the biome shown? a. cool and windy with coarse
    5·2 answers
  • Cyclopropane, a substance used with oxygen as a general anesthetic, contains only two elements, carbon and hydrogen. When 1.00 g
    12·1 answer
  • A bird flies at a speed of 15 m/s for 10 seconds, 1,200 m/min for 0.17 minute, and 2,500 cm/s for 5,000 milliseconds. What is th
    13·2 answers
  • According to the law of conservation of matter, what cannot change during a chemical reaction?.
    10·1 answer
  • Which statement about earths atmosphere is true
    5·1 answer
  • What effect do ocean and wind currents have on land temperatures?
    12·1 answer
  • An atom has 6 electrons in its outer orbit. It will most likely form an ion with a charge of:
    15·1 answer
  • HOW MANY GRAMS ARE IN 43.12 KG? WHAT IS THE UNIT?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!