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Firdavs [7]
3 years ago
6

100.0 mL of a 0.780 M solution of KBr is diluted to 500.0 mL. What is the new concentration of the solution?

Chemistry
1 answer:
Ainat [17]3 years ago
8 0
5 times dilution
0.780M x 1/5 = 0.156M
Hope this help.
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A 24% acid solution is mixed with a 14% acid solution to form a 19% acid solution. How many liters of the 24% acid solution are
Kay [80]

Answer: 5 Liters

Explanation:

According to the dilution law,

M_1V_1+M_2V_2=M_3V_3

where,

M_1 = concentration of first solution = 24%

V_1 = volume of first solution = x L

M_2 = concentration of second solution = 14%

V_2 = volume of second solution = (10-x) L

M_3 = concentration of final solution = 19%

V_2 = volume of final solution = 10 L

Putting i the values, we get:

24\times x+14\times (10-x)=19\times 10

x=5L

Therefore, 5 Liters of the 24% acid solution are used to make 10 liters of the 19% acid solution.

4 0
4 years ago
How does weathering, erosion and deposition shape the Earth and contribute to the rock cycle
Fed [463]

Answer:

it think like it kicks all the stuff away from the ground stuff, thats the best i can do sorry., im not a science person.

Explanation:

5 0
3 years ago
a 5.00 l air sample has a pressure of 107 kpa at a temperature of -50.0 C. if the temperature is raised to 102 C and the volume
Murljashka [212]
You have to use the combined gas law (P₁V₁/T₁=P₂V₂/T₂) and solve for P₂ to get P₂=P₁V₁T₂/T₁V₂.

You need to convert all of the temperature values into terms of Kelvin so -50°C turns into 223K and 102°C turns to 375K.  After you make that conversion you can just plug in all of the values into the idea gas law and you should get P₂=228.5kpa.

I hope this helps.  Let me know if anything is unclear.


4 0
3 years ago
Read 2 more answers
A certain compound is made up of one carbon (c) atom, two bromine (br) atoms, and one oxygen (o) atom. what is the chemical form
padilas [110]
Answer:
           Chemical Formula  =  COBr₂

           Structural Formula  =  Attached Below

           IUPAC Name  =  Carbonic Dibromide

           Common Name  =  Bromophosgene

As we know Carbon has the tendency to form four covalent bonds, Oxygen can form two covalent bonds and Bromine can form a single bond. Keeping this in mind we can say that in given compound carbon is forming two single bonds with two bromine atoms and a double bond with oxygen atom. Therefore, the valencies of all elements in the given compound are satisfied and completed.

7 0
4 years ago
Read 2 more answers
Why aren't descriptive investigations repeatable?
Sergeu [11.5K]
I would say that descriptive investigations aren't repeatable because it means that you are only describing something - you ask certain question about something, but do not form a hypothesis at that point yet. So it would be a waste of time to simply ask the same questions over and over again with no hypothesis to prove, which is why these types of investigations cannot be repeated.
3 0
3 years ago
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