22. How many atoms are there in 344.75 g of gold nugget? a. 1.05 x 10 to the power of 24 atoms b. 1.05 x 10 to the power of 23 a
1 answer:
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Answer:
- <u>Higher acidity (lower pH) making it a better cleaning solution because it will be able to kill more microorganisms</u>
Explanation:
The higher the percentage of the vinegar solution, the higher the molar concentration of hydrodium ions, [H₃O⁺].
pH is a measure of the concentration of H₃O⁺ ions:
The lower the pH the more acidic the solution.
Thus, the higher the percentage of vinegar, the higher [H₃O⁺], the lower the pH, and the more acidic the solution.
The feature that makes vinegar a good cleaning agent is its acidity: high acidity environments are inhospitable for many microorganisms.
Thus, the advantage of a vinegar with 6 - 15% acetic acid is its higher acidity (lower pH), which makes it more suitable to kill more microorganisms.
Answer: Option (b) is the correct answer.
Explanation:
A covalent bond is defined as the bond which occurs due to sharing of electrons between the combining atoms.
Generally, a covalent bond is formed between non-metals.
For example, both nitrogen and oxygen atoms are non-metals and they combine covalently to form compound.
As nitrogen has 5 valence electrons and an oxygen atom has 6 valence electrons. So, there occurs unequal sharing of electrons between the two.
Thus, we can conclude that when a covalent bond forms then electrons in valence shells are shared between atoms.