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Feliz [49]
3 years ago
14

What is [OH-] in a solution that has [H3O+] = 2 x 10-4 ?

Chemistry
1 answer:
ipn [44]3 years ago
5 0

Answer:

The OH- in a solution which has a H3O+ of 2x10^-4 M is 5x10^-11 M. This is because the pOH of that solution is 10.3 since it has a pH of 3.7.

hope it helped

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A reaction in which two ions switch places is which type of reaction?
AURORKA [14]

A reaction in which two ions switch places is called double-displacement reaction.

Explanation:

Double displacement reaction usually takes place between two positive ions or two negative ions. When anions or cations of totally different compounds change places, two totally different compounds are formed.  

<u>Syntax for double displacement reaction: </u>

AB + CD --> AD + BC

It can also be defined in simple terms as the reaction in which exchange of ions takes place is called double displacement reaction.

The chemical reaction is as follows:

NaOH(aq) + HCl(aq)  --> NaCl(aq)  + H2O (l)

6 0
3 years ago
How many oxygen atoms are present in 23.6 grams of aspartame?
olga55 [171]
The formula of aspartame is <span>C14H18N2O5.
From the periodic table:
molecular mass of hydrogen = 1 grams
molecular mass of carbon = 12 grams
molecular mass of nitrogen = 14 grams
molecular mass of oxygen = 16 grams

This means that:
molar mass of aspartame = 14(12)+18(1)+2(14)+5(16) = 294 grams
Therefore, each 294 grams of aspartame contains 5(16) = 80 grams of oxygen. To know number of grams of oxygen in 23.6 grams of aspartame, simply use cross multiplication as follows:
mass of oxygen = (23.6x80) / 294 = 6.42 grams</span>
7 0
3 years ago
Determine how many subatomic particles are in the following days
ololo11 [35]

Answer:

Number of protons in Na²⁴ = 11

Number of neutrons in Na²⁴ = 13

Number of electrons in Na²⁴ = 11

Number of protons in I¹³¹ = 53

Number of neutrons in I¹³¹ = 78  

Number of electrons in I¹³¹  = 53

Explanation:

Sodium is present in group one.

Atomic number of sodium is 11.

Its atomic mass is 23 amu.

Electronic configuration:

Na₁₁ = 1s² 2s² 2p⁶ 3s¹

Number of protons in Na²⁴ = 11

Number of neutrons in Na²⁴ = 13 (24-11= 13)

Number of electrons in Na²⁴ = 11

Iodine:

Iodine is halogen element.

Its atomic number is 53.

Its atomic mass is 127 amu.

Electronic configuration:

I₅₃= [Kr] 4d¹⁰ 5s² 5p⁵

Number of protons in I¹³¹ = 53

Number of neutrons in I¹³¹ = 78  (131-53= 78)

Number of electrons in I¹³¹  = 53

6 0
3 years ago
What sequence of events could lead to magma becoming soil?
ddd [48]
C. Crystalilozation followed by exposure and weathering
8 0
3 years ago
Read 2 more answers
I need help on 6a and 6b
Anuta_ua [19.1K]
You have to use Avogadro's number which is 6.02×10²³ which tells you the number of particles in 1 mole of a sample.

6a) 2mol Fe²⁺
(2mol Fe²⁺)×(6.02×10²³ions/mol)=<span>1.2×10²⁴ ions of Fe²⁺

</span>6b) 4.5mol BCl₃
(4.5mol BCl₃)×(6.02×10²³ molecules/mol)=2.7×10²⁴molecules of BCl₃

I hope this helps.  Let me know if anything is unclear.
4 0
3 years ago
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