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
nikklg [1K]
2 years ago
9

Can someone find from which website this test is?

Chemistry
1 answer:
Nadusha1986 [10]2 years ago
8 0

Answer:

Try quizlet, they have everything on there

Explanation:

You might be interested in
Which of these elements has the smallest atomic radius?
shutvik [7]

Answer:

Its Br on Ap ex

Explanation:

Just got it wrong ;( it's B

4 0
3 years ago
Explain why is it better to use images on hazard labels, rather than words
enot [183]
In the case of an emergency where you might not have enough time to read several lines of writing, not to mention trying to find the hazard warnings when the whole bottle is probably covered in writing, it is much easier to locate and read universal hazard symbols.
5 0
3 years ago
Read 2 more answers
|
lilavasa [31]

1.66 M is the concentration of the chemist's working solution.

<h3>What is molarity?</h3>

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.

In this case, we have a solution of Zn(NO₃)₂.

The chemist wants to prepare a dilute solution of this reactant.

The stock solution of the nitrate has a concentration of 4.93 M, and he wants to prepare 620 mL of a more dilute concentration of the same solution. He adds 210 mL of the stock and completes it with water until it reaches 620 mL.

We want to know the concentration of this diluted solution.

As we are working with the same solution, we can assume that the moles of the stock solution will be conserved in the diluted solution so:

n_1= n_2  (1)

and we also know that:

n = M x V_2

If we replace this expression in (1) we have:

M_1 x V_1= M_2 x V_2

Where 1, would be the stock solution and 2, the solution we want to prepare.

So, we already know the concentration and volume used of the stock solution and the desired volume of the diluted one, therefore, all we have to do is replace the given data in (2) and solve for the concentration which is M_2:

4.93 x 210 =  620 xM_2

M_2 = 1.66 M

This is the concentration of the solution prepared.

Learn more about molarity here:

brainly.com/question/19517011

#SPJ1

6 0
2 years ago
HELLLLP ITS 8TH GRADE SCIENCE AND DUE TODAY
insens350 [35]

Answer:G

Explanation:

I would look it up on safari just to be sure tho, hope this helps

6 0
2 years ago
Which of the following methods can be used to completely separate a solution containing alcohol and water?
liq [111]
A) i think is the answerrrrr
8 0
3 years ago
Other questions:
  • Select the statement about mixtures that is correct. Select one: a. Suspensions are homogeneous mixtures of two or more componen
    15·1 answer
  • Is water polar or dipolar ?
    7·2 answers
  • Determine the volume of methane (ch 4 ) gas needed to react completely with 0.660 l of o 2 gas to form methanol (ch 3 oh).
    9·1 answer
  • Are you my mother? Please answer me...
    11·2 answers
  • Measurements show that the enthalpy of a mixture of gaseous reactants increases by 243.kJ during a certain chemical reaction, wh
    5·1 answer
  • What is the structure of carbon
    5·1 answer
  • For which element are the number of protons, electron, and neutrons are 36, 36, and 48 respectively? a cadmium b rubidium c brom
    12·2 answers
  • The pressure gauge on a compressed air tank reads 43.2 pounds per square inch (lb/in?). What is the
    14·1 answer
  • Some of the physical properties used to distinguish between the three groups are: _________
    10·2 answers
  • What is the name of the compound CaCo3​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!