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Stells [14]
3 years ago
12

What is the pH of a solution if the [H3O+] is 6.7*10-4m?

Chemistry
1 answer:
prohojiy [21]3 years ago
8 0
You need 5 basic conversions (some give you a 6th, but all you need are these 5): 

<span>1) pH = –log [H+] (negative log of the concentration of the hydronium ion) thus, </span>
<span>2) [H+] = 10 ^ -pH. </span>
<span>3) pOH = –log [OH-] and thus, </span>
<span>4) [OH-] = 10 ^ -pOH </span>
<span>5) pH + pOH = 14 </span>
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Explanation needed please!
VashaNatasha [74]

Answer:

Below

Explanation:

2) there are 28 protons in this isotope

     The number that is on the bottom of the "stacked pair" tells you how many protons are in this isotope. It is often represented by the variable Z.

3) there are 35 neutrons in this isotope

     Subtract the number of protons (28) from the top number

4) there are 28 electrons in the neutral element of Nickel

     If you were to look at the period table and find Ni, you would see that its atomic number is 28. This number tells us the amount of protons and electrons there are in that element.

5) 62.9296694 atomic mass units

     Just search it up (unless your teacher wants you to calculate it)

6) there are 92 protons in this isotope

     Again just look at the Z value to find the proton count

7) there are 146 neutrons in this isotope

     Subtract 238 - 92 = 146

8) there are 92 electrons in the neutral element of uranium

     Again just look at the periodic table and find U

9) 238.0507882 atomic mass units

10) 12C or carbon 12 is more likely to bond with oxygen that 14c carbon 14

     This is because 12C is more abundant at 98.93% than 14C

Hope this helps! Best of luck <3

6 0
2 years ago
Please help! I have no idea what a galactic symbol is. It says it on one of my science assignments and I'm confused. All I know
Ilya [14]
Hey, its alright bro! I gotchu.

Im pretty sure the galactic symbol is the same reference to the symbol of the element on the periodic table.
For an example (Hydrogen) is H 
So if im correct im pretty sure its referring to the symbols for each element

Hopefully this helps
4 0
3 years ago
Read 2 more answers
HELP ASAP!!!
Paraphin [41]
Solution..
---------------

Let's calculate the mass of CO₂.

We have (12+(16*2))
= 12+32
=44gmol¯¹..

a. What is the percent by mass of carbon?

Mass of carbon /mass of CO₂ × 100%

12/44 × 100%

=27.3%...

b. What is the percent by mass of oxygen?

Mass of oxygen/mass of CO₂ × 100%

(2×16)/44 × 100%

32/44 × 100%

=72.7%....

To check.. You'll add this two percentage compositions together and see of it gives 100%... If it does then we're good...

27.3%+72.7% = 100%.... Checked..

Hope this helped....?
8 0
3 years ago
Read 2 more answers
Select all that apply.
Fed [463]
 To improve the efficiency of fireplaces, technologies such as A. addition of catalytic combustors and B. <span>addition of boilers are used in so far. Addition of catalytic combustors hastens the process and makes use of inerts that cannot be used. The addition of boilers also adds to the efficiency by converting fluids to higher temperatures,</span>
7 0
3 years ago
Read 2 more answers
Molten sodium chloride is broken down in an electrolytic cell into the elements sodium and chlorine. Where do the
barxatty [35]

Answer:Chlorine gas bubbles out of the melt above the anode. Sodium ions migrate to the cathode, where electrons enter the melt and are reduced to sodium metal

Explanation:

5 0
2 years ago
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