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
Alex
2 years ago
9

KCl is an ionic salt with a formula weight of 74.54 g/mole. A 1.417 M (mole/liter) KCl solution has a density of 1064.5 grams/li

ter at 20.0 OC. Use the Molarity and the formula weight to find the mass (g) of salt in one liter. Then, find the mass (g and kg) of water in one liter of the solution as the difference between the solution mass and the KCl mass. Include the conversion factor. Determine the molality (m), or moles of salt per kg of water, by dividing the moles of salt in one liter by the kg of water in one liter. Show all units and use proper significant figures. (
Chemistry
1 answer:
xenn [34]2 years ago
3 0

Answer:

Mass of the salt:  105.6g of KCl.

Mass water: 958.9g of water.

Molality: 1.478m.

Explanation:

<em>Mass of the salt:</em>

In 1L, there are 1.417 moles. In grams:

1.417 moles KCl * (74.54g / mol) = 105.6g of KCl

<em>Mass of the water:</em>

We can determine the mass of solution (Mass of water + mass KCl) by multiplication of the voluome (1L and density 1064.5g/L), thus:

1L * (1064.5g / L) = 1064.5g - Mass solution.

Mass water = 1064.5g - 105.6g = 958.9g of water

<em>Molality:</em>

Moles KCl = 1.417 moles KCl.

kg Water = 958.9g = 0.9589kg.

Molality = 1.417mol / 0.9589kg = 1.478m

You might be interested in
Which unit applies principles and techniques of chemistry, physics, and geology to the identification and comparison of crime sc
Arlecino [84]

The physical science unit of criminal investigation applies principles and techniques of chemistry, physics, and geology to the identification and comparison of crime scene evidence.

<h3>What is forensics in criminal investigation?</h3>

Forensics science is any of several fields of study involving the collection of physical evidence and its subsequent analysis.

The aim is to use of science and technology in the investigation and establishment of facts or evidence in a court of law.

There are several units involved in forensics science such as the following;

  • Biology unit
  • Physical science unit

The physical unit of forensics is the unit that applies principles & techniques on chemistry, physics and geology, which are physical science fields, to identify and compare crime scene evidence.

Learn more about forensics at: brainly.com/question/14403044

#SPJ1

8 0
1 year ago
This plant is grabbing onto the rod as it grows upward. Which tropism is this?
aliya0001 [1]
Thigmotropism is the answer
5 0
3 years ago
Read 2 more answers
A particular brand of gasoline has a density of .737g/mL at 25 C. How many grams of this gasoline would fill a 14.1 gal tank (1
Ivan

Answer: 5.06g/mL

Explanation: 14.1÷.737=19.131614654

19.131614654/3.78= 5.0612

6 0
3 years ago
Please help i will mark brainlist
Sphinxa [80]

Answer:

V= 21 cubic cm (( I am not sure about density ))

Explanation:

V= L×W×H

4 0
2 years ago
Read 2 more answers
What is (3.2x10^14) x (7.3x10^10)
Molodets [167]
So first, you would take 10 and raise it up to the 14th power. Then take 10, and raise it up to 10th power. After doing all the work, your answer should be 2.336E29.
8 0
3 years ago
Other questions:
  • What is the mass (in grams) of 169 mole of CF4
    8·1 answer
  • If a sample of HF gas at 694.9 mmHg has a volume of 3.463 Land the volume is changed to 5.887 L, then what will be the new press
    7·1 answer
  • An industrial chemist studying bleaching and sterilizing prepares several hypochlorite buffers. Find the pH of the following buf
    9·1 answer
  • Why is a 9-v transistor battery used as the source of electrical power for electrolysis rather than the power supply that plugs
    6·1 answer
  • A trend in the periodic table means?
    15·1 answer
  • Un tanque de acetileno para una antorcha de soldadura de oxiacetileno proporciona 9340 L de gas acetileno, C2H2, a 0°C y 1 atm 2
    12·1 answer
  • 3
    14·2 answers
  • U wanna talk with me hit me up
    11·1 answer
  • What is a quantum of energy?
    6·2 answers
  • What are the two properties of Graphite that are different from the properties of Diamond?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!