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2 years ago

Define the SI unit fro length, mass time , and temperature

Chemistry

1 answer:

Julli [10]2 years ago

7 0

Length=The distance between two points

Mass=The amount of matter contained in a body

Time=The interval or duration between two events

Temperature=The hotness and coldness of a body

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Help idk how to do this

maksim [4K]

Answer:

Explanation:

so we have to solve it or just answer it?

8 0

2 years ago

Please help. I will post another sheet because I need help, thanks!

Sliva [168]

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3 years ago

Determine the resulting pH when 12mL if 0.16M HCl are reacted with 32 mL if 0.24M KOH.

TEA [102]

Answer:

pH = 13.1

Explanation:

Hello there!

In this case, according to the given information, we can set up the following equation:

$HCl+KOH\rightarrow KCl+H_2O$

Thus, since there is 1:1 mole ratio of HCl to KOH, we can find the reacting moles as follows:

$n_{HCl}=0.012L*0.16mol/L=0.00192mol\\\\n_{KOH}=0.032L*0.24mol/L=0.00768mol$

Thus, since there are less moles of HCl, we calculate the remaining moles of KOH as follows:

$n_{KOH}=0.00768mol-0.00192mol=0.00576mol$

And the resulting concentration of KOH and OH ions as this is a strong base:

$[KOH]=[OH^-]=\frac{0.00576mol}{0.012L+0.032L}=0.131M$

And the resulting pH is:

$pH=14+log(0.131)\\\\pH=13.1$

Regards!

3 0

3 years ago

If a lab requires each lab group to have 25ml of a solution and it takes 15 grams of CuNO3 to make 1 liter of solution how many

tino4ka555 [31]

We need to do some general algebra here.

We will find that you need 8.25 grams of CuNO₃ to make enough solution for the 22 labs.

We know that:

Each lab group needs 25 ml of solution.
it takes 15 g of CuNO₃ to make one L of that solution.
There are 22 labs.

Because each lab needs 25 ml of solution, 22 labs will need that amount 22 times, so the total amount of solution needed is:

22*25ml = 550 ml

Now we know that we need 15 grams to make one liter of solution, and:

1 L = 1000ml

Then you need 15g to make 1000ml

and x (we want to find this amount) to make 550ml

Then we can write two equations (not actual equations, as these are different units) like:

x = 550ml

15g = 1000ml

Now we can take the quotient between these two equations:

x/15 g = (550ml/1000ml)

And now we can solve this for x:

x = (550ml/1000ml)*15g = 8.25g

So you need 8.25 grams of CuNO₃ to make enough solution for the 22 labs.

If you want to learn more, you can read:

brainly.com/question/8743486

5 0

3 years ago

What is the percentage composition of CF4

adoni [48]

The percentage composition of CF4 is %C = 13.64% and %F = 86.36%

The solution are as follows:
Molar mass of CF4 = 88
molar mass of C = 12 
molar mass of F = 4x19 = 76 

% C = 12/88 x 100 = 13.64% 
% F = 76/88 x 100 = 86.36%

8 0

3 years ago

Read 2 more answers