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Tanzania [10]
2 years ago
6

Is chlorine a substance or a mixture

Chemistry
1 answer:
WARRIOR [948]2 years ago
8 0

Answer:

its a substance

Explanation:

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A solution prepared by mixing 10 ml of 1 m hcl and 10 ml of 1.2 m naoh has a ph of
blagie [28]

Answer: pH of resulting solution will be 13

Explanation:

pH is the measure of acidity or alkalinity of a solution.

Moles of H^+ ion = Molarity\times {\text {Volume in L}}=1M\times 0.01L=0.01mol

Moles of OH^- ion = Molarity\times {\text {Volume in L}}=1.2M\times 0.01L=0.012mol

HCl+NaOH\rightarrow NaCl+H_2O

For neutralization:

1 mole of H^+ ion will react with 1 mole of OH^- ion

0.01 mol of H^+  ion will react with =\frac{1}{1}\times 0.01mole of OH^- ion

Thus (0.012-0.01)= 0.002 moles of OH^- are left in 20 ml or 0.02 L of solution.

[OH^-]=\frac{0.002}{0.02L}=0.1M

pOH=-log[OH^-]

pOH=-log[0.1]=1

pH+pOH=14

pH=14-1=13

Thus the pH of resulting solution will be 13

7 0
3 years ago
The bright-line spectrum of an element in the gaseous phase is produced as
sesenic [268]
Electrons move from higher energy states to lower energy states Hope this helped
3 0
3 years ago
Which formula can be used to find velocity if kinetic energy and mass are known?
astraxan [27]

Answer:

v =  \sqrt{ \frac{2ke}{m} }

option D is the correct option.

Here,

If an object of mass 'm' moving with a velocity'v' then,

kinetic \: energy =  \frac{1}{2} m {v}^{2}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:    {v}^{2}  =  \frac{2ke}{m}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  {v}^{2}  =  \sqrt{ \frac{2ke}{m} }

hope this helps...

Good luck on your assignment..

5 0
3 years ago
suggest two observations that you can make when Calcium reacts with water and write a balanced equation for the reaction of calc
Kamila [148]

• Bubbles of a colourless, odourless gas are evolved

• The solution turns red litmus blue

       Ca + 2H_2O→ Ca(OH)_2 + H_2

8 0
3 years ago
Contrast the chemical reactivity of potassium lithium and sodium
Colt1911 [192]
Answer is: lithium is the least reactive and potassium is the most reactive of the three alkali elements. 
<span>The </span>reactivity<span> of the alkali metals increases down the group because one valence electron (I group of Periodic system of elements) is farther away from nucleus and attraction force between electron and proton is weaker.</span>
4 0
3 years ago
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