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lakkis [162]
2 years ago
9

(9) A penny contains 22,452,000,000,000,000,000,000 zinc atoms and also contains

Chemistry
1 answer:
KiRa [710]2 years ago
7 0

Answer:

a

Explanation:

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What are isotopes please help
NikAS [45]

Answer:

Isotopes are atoms of the same element with the same number of protons but different number of neutrons.

Hope this helps.

6 0
3 years ago
Read 2 more answers
Which is the stronger acid in each of the following pairs? Explain your reasoning.
Makovka662 [10]

Answer:p-hydroxybenzaldehyde is stronger acid to phenol

para-cyanophenol is stronger acid to meta-cyanophenol

o-fluorophenol is stronger acid to p-fluorophenol.

Explanation:

The PKa tool relative to Ph are used to contrast the pairs.

The pKa of phenol is 10. The pKa of p-hydroxybenzaldehyde is 9.24

The pKa for meta-cyanophenol is 8.61 and the pKa for para-cyanophenol is 7.95. 

The pKa value of o-fluorophenol is 8.7, while that of the p-fluorophenol is 9.9. It's obvious that the inductive effect is more dominant at ortho-position, which results in a more acidic nature

The pKa is the pH value at which a chemical species will accept or donate a proton. The lower the pKa, the stronger the acid and the greater the ability to donate a proton in aqueous solution.

6 0
3 years ago
Convert 45.5 mmHg into kPa
Karolina [17]

Answer:

for anapproximate result , divide the pressure value by 7.501

8 0
3 years ago
Can you find the error?<br> MgOH2
Ira Lisetskai [31]

The error is in the formula is bracket so the correct is Mg(OH)₂

The incorrect or error in the formula is bracket that would be that the compound contain only 1Mg atom and 1 oxygen atom and 2 hydrogen atom but is wrong when you write it in an electron dot diagram you will see that it is wrong there be unshared paired of electron and the correct formula is Mg(OH)₂

Know more about Mg(OH)₂

brainly.com/question/2597872

#SPJ1

6 0
1 year ago
Explain why calcium metal after reacting with water starts floating on its surface. Write the chemical equation for this reactio
Oksanka [162]

Firstly, the chemical equation between the calcium metal and water will be:  

Ca(s) + 2 H₂O(l) → Ca(OH)₂(aq) + H₂(g)  

We can see from the equation the bubbles of hydrogen gas which are formed during the reaction stick to the surface of the metal and hence calcium floats on water.  

The other metal that will float on the water during the reaction is magnesium which have the same chemical behavior like calcium, we can illustrate that by the chemical equation:

Mg(s) + 2 H₂O(l) → Mg(OH)₂(aq) + H₂(g)

3 0
3 years ago
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