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
Dahasolnce [82]
2 years ago
5

A 1.00 L of a solution is prepared by dissolving 125.6 g of NaF in it. What would be the molarity of this solution?

Chemistry
1 answer:
DedPeter [7]2 years ago
4 0

Answer:

2.99 M

Explanation:

In order to solve this problem we need to keep in mind the definition of molarity:

  • Molarity = moles of solute / liters of solution

In order to calculate the moles of solute, we <u>convert 125.6 g of NaF into moles</u> using its <em>molar mass</em>:

  • 125.6 g NaF ÷ 42 g/mol = 2.99 mol NaF

As the volume is already given, we can proceed to <em>calculate the molarity</em>:

  • Molarity = 2.99 mol / 1.00 L = 2.99 M
You might be interested in
An aqueous solution of 1.29 M ethanol, CH3CH2OH, has a density of 0.988 g/mL. The percent by mass of CH3CH2OH in the solution is
anzhelika [568]

Answer:

6%

Explanation:

Hello, for this case, we assume that the volume of the solution is 1L, thus, the mass is given by using the density as follows:

m_{solution}=1L*\frac{1000 mL}{1L}*\frac{0.988g}{1mL} =988g

Now, the mass of the ethanol:

m_{C_2H_5OH}=(1.29molC_2H_5OH/L*1L)*\frac{46gC_2H_5OH}{1molC_2H_5OH} \\m_{C_2H_5OH}=59.34g

Finally, the by mass percent is:

m/m=\frac{59.34g}{988g}*100\\%

%m=6%

Best regards.

4 0
2 years ago
If oxygen has a molar mass of 16.0 g/mole, carbon has a molar mass of 12.0 g/mole and hydrogen has a molar mass of 1.01 g/mole,
Stolb23 [73]
The number of mole of ethanol present in the beaker is 0.217 mole

Description of mole
The mole of a substance is related to it's mass and molar mass according to the following equation:
Mole = mass / molar mass

How to determine the mole of C₂H₅OH
From the question given above, the following data were obtained:
Mass of C₂H₅OH = 10 g
Molar mass of C₂H₅OH = (12×2) + (1.01×5) + 16 + 1.01 = 46.06 g/mol
Mole of C₂H₅OH =?

Mole = mass / molar mass
Mole of C₂H₅OH = 10 / 46.06
Mole of C₂H₅OH = 0.217 mole


Learn more about mole:
brainly.com/question/13314627

#SPJ1
5 0
2 years ago
A molecule in which the central atom has no lone pairs and forms four single bonds is said to have a ________ shape.
Margarita [4]
It should be tetrahedral. Good example is CH4
4 0
3 years ago
Read 2 more answers
Need water cycle project ideas. I need to make a video about the water cycle for my teacher but i dont have any ideas.And, i do
lara [203]
Take a zip lock bag and draw clouds on the outside with a sharpie then fill the bag with water and then tape it on a window that has a lot of sun and wait awhile and there should be a change in the water and that shooed what happens to water when it’s warm/sunny out
6 0
3 years ago
Read 2 more answers
Which of the following questions about the flu is a scientific question?
qwelly [4]
D. Is a fly shot effective in preventing the flu?

Answer A touches on the topics of economics and industrial feasibility of the flu shot.
B is more of an ethical / situational question.
C is a social question.
D is the only question which focuses on the science of microbiology and medicine.
5 0
3 years ago
Read 2 more answers
Other questions:
  • How many joules of heat are removed from a 21.0 g sample of water if it is cooled from 34.0°C
    7·1 answer
  • A student mixes a spoonful of sugar into a glass of water and stirs until the sugar dissolves completely. Match each substance t
    15·1 answer
  • Use trends in the periodic table to predict the intensity of the following reactions. Match the letter of each reaction to the p
    6·1 answer
  • A substance that speeds up the rate of a chemical reaction is called
    13·2 answers
  • Two fundamental concepts about the ion channels of a resting neuron are that the channels _____.
    14·1 answer
  • The electron configuration of a neutral atom is 1s22s22p63s2. Write a complete set of quantum numbers for each of the electrons.
    6·1 answer
  • Which is the main reason cells are replaced in the body?
    11·1 answer
  • In some areas of Texas, rainfall quickly soaks through layers of porous rock and is stored naturally underground. The water is t
    10·1 answer
  • Help! Im gonna fail if i dont get the answer.
    14·2 answers
  • How many carbon monoxide molecules are in 0.75 moles of carbon monoxide?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!