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
mrs_skeptik [129]
3 years ago
12

Calcule la molalidad de una 20g Ca Cl₂ en 250g de que contiene solucion H₂O.

Biology
1 answer:
ahrayia [7]3 years ago
8 0

Answer:

The solution is 0, 90 molal. See the explanation below, please

Explanation:

Molality is defined as moles of solute in 1 kg of solvent (1000 grams). The following three simple rule must be performed:

We calculate the weight of 1 mol of CaCl2

Weight Ca =40, 078 g

Weight Cl= 35, 453 g

Weight of 1 mol of CaCl2=40, 078g + 2x (35, 453g )= 110, 98g

110, 98 g ---1 mol

25 g---X= (25g x1 mol)/110, 98g= 0,23mol

250g solvent -----0,23 mol CaCl2 (the solute)

1000g solvent ----X = (1000g x0,23mol)/250g =0,90 mol solute

The solution is 0,90 molal

You might be interested in
Which of the following is NOT a way to transmit STIs?
Sophie [7]

The answer is c. not b.


5 0
3 years ago
Read 2 more answers
What do we call a virus that attacks a bacterium?
PIT_PIT [208]

Answer:bacteriophages

Explanation:

6 0
3 years ago
What stage of cellular respiration stage of cellular respiration uses the high-energy electrons from nadh and fadh2 to form ATP
AURORKA [14]
Electron Transport chain, the final stage of cellular respiration
3 0
3 years ago
Read 2 more answers
Find the resistance of a portable lantern that uses a 24V power supply and draws a current of 0.80A. PLZ HURRY LOTS OF POINTS PH
ira [324]

Answer:

Resistance = 30 Ω

Explanation:

The resistance of an electric circuit = \frac{Voltage}{current}

voltage = 24V

current (I) = 0.80A

Therefore, R = \frac{24}{0.8}  = 30

R = 30 ohms

5 0
3 years ago
Some of the food in the protein group and dairy group are high in saturated fats and cholesterol. These raise which cholesterol
BigorU [14]

The food in the protein group and dairy group are high in saturated fats and cholesterol, it raise LDL in blood.

<h3>What is cholesterol?</h3>

Cholesterol is a waxy like substance synthesized from two sources such as liver and from animals like meat, poultry, diary product.

There are two types of cholesterol, one is bad called LDL cholesterol and second one is good called as HDL.

LDL narrow down the arteries by depositing fats in it, the condition known as atherosclerosis which leads to increase in risk for heart attack, stroke and peripheral artery disease.

On the other hand, HDL protect against heart attack and stroke

Third component called triglycerides are the common type of fat act as a reservoir of excess energy.

Hence, LDL is the correct answer.

Learn more about cholesterol, here:

brainly.com/question/14528218

#SPJ4

3 0
1 year ago
Other questions:
  • Investigation: how does temperature affect respiration rates of fish? answers
    6·1 answer
  • For most ecosystems __________ is (are) the ultimate source of energy, and energy leaves the ecosystem in the form of __________
    11·1 answer
  • How is energy expended in active transport​
    12·1 answer
  • What do the stripes in the paper represent?
    14·2 answers
  • Which of the following are considered macromolecules? Select all that apply. (2 points)
    12·1 answer
  • The what surrounds the heart in humans
    10·1 answer
  • How does your body ensure that the new cells are the same?
    14·1 answer
  • 9. The classification system groups organisms in progressively _______<br> categories.
    8·1 answer
  • What is the Maize C4 photosynthesis process
    11·1 answer
  • 3. What happens as a population approaches carrying capacity?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!