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Reptile [31]
3 years ago
13

What is the total number of electron pairs shared between the two atoms in an O2 molecule?

Chemistry
1 answer:
vodka [1.7K]3 years ago
8 0
The answer is (2) 2 pairs. The oxygen atoms combine to get stable structure. So after the combination, each atom needs to have 8 electrons. So when they share 4 electrons can satisfy this requirement. Then there are 2 pairs shared.
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cluponka [151]
Wow. What language is this?
3 0
3 years ago
Calcule el poh de una disolucion de acido bromhidrico hbr 0.176m
Lerok [7]

Answer:

pOH = 13.246

Explanation:

pH = -log[H+]

[H+] = [HBr] porque HBr es un acido fuerte.

pH = -log(0.176) = 0.754

pH + pOH = 14

pOH = 14 - 0.754 = 13.246

4 0
3 years ago
How much Sr(OH)2 • 8 H2O (M = 265.76) is needed to prepare 250.0 ML of solution in which [OH]= 0.100M?
SVEN [57.7K]
Use the formula 
first step: 
Use the formula 
molarity= mole/liter
change ml to l
plug in data
 to get .1=mole/.25 or .1M*.25liter
which =.025 moles
then divide .025 moles by two because there are two OH in Sr(OH)2 
then multiply that by 265.76 (the molar mass of water) 
.0125*265.76
which is 3.32grams this is your answer 




6 0
3 years ago
Read 2 more answers
Calculate the ratio of naf to hf required to create a buffer with ph = 4.05.
NARA [144]
PH is the test of acidity or basicity of a solution. it follows the formula: 
pH = pKa + log [salt] / [acid] where NaF is the salt and HF is the acid in this case. 

By literature, Ka of HF is 3.5*10^-4 
<span>pKa= -log(Ka)=</span><span> 3.46 </span>

<span>pH = pKa + log [NaF / [HF] </span>

4.05 = 3.46 + log [NaF / [HF] 

log [NaF / [HF]<span> = 0.59
</span>
[NaF / [HF] = 3.89
4 0
3 years ago
Read 2 more answers
The nucleus of an atom consists of
Ksenya-84 [330]

Answer:

The nucleus of an atom consists of Protons and Neutrons.-A.

5 0
3 years ago
Read 2 more answers
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