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Tema [17]
3 years ago
5

What is the atomic number of an atom?

Chemistry
1 answer:
ludmilkaskok [199]3 years ago
4 0

Answer: The number of protons

Explanation:

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Masja [62]
Physical change!


a solid that turns into a liquid is called melting and melting is a physical change.


something like that. sorry if it’s wrong
6 0
3 years ago
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What is not consider a property of substance
nasty-shy [4]

Answer:

f

Explanation:

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3 years ago
A 1dm3 solution was made by mixing 0.0040 mol of HCl(aq) and 0.0025 mol of NaOH(aq). What was the pH of the resulting solution?
kicyunya [14]

The pH of the resulting solution is 2.82.

<h3>What is pH ?</h3>

pH is the measure of acidity and alkalinity of a solution , It has a range of 1 to 14.

HCl          +                   NaOH      →         NaCl       +         H₂O

0.0040                         .0025                 0                       0

0.0040 -0.0025             0                   0.0025          0.0025

Moles of HCl = 0.0015

As 0.0025 moles of NaOH reacts with 0.0025 moles of HCl leaving behind 0.0015 moles of HCl

Concentration of HCl = 0.0015/ 1 = 0.0015 M

[ H⁺] = 0.0015 M

pH = -log [ H⁺]

pH = -log [ 0.0015]

pH = 2.82

Therefore the pH of the resulting solution is 2.82.

To know more about pH

brainly.com/question/15289741

#SPJ1

7 0
2 years ago
The urinary bladder is a muscular organ of the excretory system that collects urine excreted by the kidney. How does the nervous
Arlecino [84]

Explanation:

it helps in when the kidney has used the needful nutrients been taken then the unwanted waste product it sends it to the nervous system then the nervous system passes the waste product to the bladder in form of urine

3 0
3 years ago
Convert 2,247,896 milligrams (mg) to pounds (lb) rounding to 3 sig figs
Dovator [93]
4.96 would be you’re answer
6 0
3 years ago
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