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
erik [133]
3 years ago
13

On a shelf sits a bottle of NaCl solutions with a molar concentration of 2.50 M and a total volume of 300 mL. If 15.0 mL of the

solution is added to 985 mL of pure water, what is the molar concentration of NaCl in the new solution
Chemistry
1 answer:
Stella [2.4K]3 years ago
8 0

Given :

On a shelf sits a bottle of NaCl solutions with a molar concentration of 2.50 M and a total volume of 300 mL. If 15.0 mL of the solution is added to 985 mL of pure water .

To Find :

The molar concentration of NaCl in the new solution.

Solution :

Molarity M is given by :

M=\dfrac{\text{Total number of moles}}{\text{Volume in liters}}

Now , 1000 ml of NaCl contains 2.5 moles of NaCl .

So , 15 ml of NaCl contains :

n=\dfrac{15\times 2.5}{1000}\\\\n=3.75\times 10^{-2}\ moles

New , volume V = 15 + 985 = 1000 ml = 1 L .

So , putting value of n and V in above equation :

M=\dfrac{3.75\times 10^{-2}}{1}\ M\\\\M=0.0375\ M

Therefore ,  the molar concentration of NaCl in the new solution is 0.0375 M .

Hence , this is the required solution .

You might be interested in
What is the definition of solution?
Travka [436]
For example <span>in chemistry, a solution is a homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent.</span>
5 0
3 years ago
"I think of a number, multiply it by itself and then add 6 to the result<br>+​
Sonja [21]

Answer:

ok 3 = 9 15 i got 15 so what

Explanation:

5 0
3 years ago
The amount of which subatomic particle is different between an atom and its ion?
11111nata11111 [884]
There are three subatomic particles known: (1) electron which is found outside the nucleus of an atom and (2 and 3) protons and neutrons which are both inside the nucleus. As they are outside the nucleus, it is easier to transport electron than any other subatomic particle. Thus, atom and its ion differ in the number of electrons. 
7 0
3 years ago
5. What volume of silver metal will weigh exactly 4500.0 g. The density of silver is 20.5 g/cm.
Vitek1552 [10]

Answer:

The answer is

<h2>219.5 mL</h2>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density} \\

From the question

mass = 4500 g

density = 20.5 g/cm³

We have

volume =  \frac{4500 }{20.5}  \\  = 219.51219...

We have the final answer as

<h3>219.51 mL</h3>

Hope this helps you

8 0
3 years ago
A brick has a mass of 4.0 kg and the Earth has a mass of 6.0 × 1027 g. Use this information to answer the questions below. Be su
Vedmedyk [2.9K]

Answer:

a) 2.4\times 10^{24} kg is the mass of 1 mole of bricks.

b) 2.5\times 10^3 moles of bricks have a mass equal to the mass of the Earth.

Explanation:

a) Mass of brick = 4.0 kg

1 mole = N_A=6.022\times 10^{23} particles/ atoms/molecules

Mass of N_A bricks :

=6.022\times 10^{23}\times 4.0 kg=2.4088\times 10^{24} kg\approx 2.4\times 10^{24} kg

2.4\times 10^{24} kg is the mass of 1 mole of bricks.

b)

Mass of the Earth = M = 6.0\times 10^{27} kg

Mass of 1 mole of brick = m=2.4\times 10^{24} kg

Let the moles of brick with equal mass of the Earth be x.

m\times x=M

x=\frac{M}{m}=\frac{6.0\times 10^{27}kg}{2.4\times 10^{24} kg}=2.5\times 10^3

2.5\times 10^3 moles of bricks have a mass equal to the mass of the Earth.

7 0
3 years ago
Other questions:
  • A solution with a ph less than 7 is called a(n) _____________ and has a higher number of ___________ than a solution with a ph g
    14·1 answer
  • What do all eukaryotic cell have in common?
    13·1 answer
  • The observation has to be made up and i can’t think of anything or a hypothesis who can help!
    9·1 answer
  • Use the drop-down menus to select the part of Earth best described by each phrase.
    12·2 answers
  • PH of a 0.00072 M HCl solution.
    5·1 answer
  • We can use thin layer chromatography to check if Starbuck coffee has caffeine.<br> True<br> False
    11·1 answer
  • Concentration data is commonly monitored during a reaction to determine the order with respect to a reactant. Consider the types
    14·1 answer
  • 10. A(n) eclipse occurs at a full moon when Earth is directly between the moon and the sun.​
    9·1 answer
  • (04.02 LC) Based on the cell theory, which of the following is true?
    12·1 answer
  • How does the skeletal and muscular systems work together?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!