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
irinina [24]
3 years ago
13

Commercial grade HCl solutions are typically 39.0% (by mass) HCl in water. Determine the molality of the HCl, if the solution ha

s a density of 1.20 g/mL
Chemistry
1 answer:
marta [7]3 years ago
8 0

Molality of the solution is defined as the number of moles of a substance dissolved divided by the mass of the solvent:

Molality = number of moles / solvent mass

From the concentration of 39% (by mass) of HCl in water, we construct the following  reasoning:

in 100 g solution we have 39 g hydrochloric acid (HCl)

number of moles  = mass / molecular weight

number of moles of HCl = 39 / 36.5 = 1.07 moles

solvent (water) mass = solution mass - hydrochloric acid mass

solvent (water) mass = 100 - 39 = 61 g

Now we can determine the molality:

molality = 1.07 moles / 61 g = 0.018

You might be interested in
What is the net ionic equation for the reaction of solid iron with aqueous copper sulfate?
lozanna [386]
This is a single replacement reaction. So the final products are a metal and a salt with replaced cation. In this case, the final products are copper (metal) and iron sulfate (salt). 
8 0
2 years ago
Classify the items based on whether they are or are not matter.
Phantasy [73]

Answer:

Matter:

toothpaste

gasoline

bacteria

cell

Not matter:

happiness

sound

Explanation:

Matter is something that has mass and volume. Happiness is just a feeling, it doesn't exist in 3d world. Sound is a wave or just the movement of matter (particles of matter). Others have masses and volumes.

6 0
3 years ago
How a cold front affects weather.
miskamm [114]

Answer:

A cold front forms when a cold air mass pushes into a warmer air mass. Cold fronts can produce dramatic changes in the weather. ... As the cold front passes, winds become gusty. There is a sudden drop in temperature, and also heavy rain, sometimes with hail, thunder, and lightning.

4 0
3 years ago
Read 2 more answers
What is the mass of 4 moles of helium, He?
aniked [119]
I am pretty sure it is 4.002602
4 0
2 years ago
The two different types of color are primary light colors and primary pigment colors. True or false
Nonamiya [84]
Your answer would be True
7 0
3 years ago
Other questions:
  • Fluorine (F) has seven electrons in its outermost shell. Fluorine _____.
    9·2 answers
  • 0.378 mL + 42.3 mL - 1.5833 mL
    7·1 answer
  • Express as ordinary numbers. 6.02 x 109 =
    15·1 answer
  • Explain the process on how the conditions for lightning to strike occurs?
    12·1 answer
  • A substance made of two or more atoms bonded together
    7·2 answers
  • Is c10H8 a conductor
    8·1 answer
  • Pls help <br> Plot the point (5,9)
    5·2 answers
  • 17 moles of oxygen is equal to
    11·1 answer
  • Write the number below in scientific notation rounded off to 3 significant figures.
    10·1 answer
  • 108.95 g/mol, C3H2Cl2 Express your answer as a chemical formula.​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!