Because they are different elements have different number of protons and neutrons........ I guessed do not trust me...
Answer:

Explanation:
Hello,
In this case, by knowing that the used NaOH equals in moles the acid (monoprotic) as shown below, during the titration:

By knowing the volume and the concentration of the NaOH, one obtains:

Thus, the molar mass of the acid is computed based on the previously computed moles and the given mass as follows:

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Answer:
n = 1.7 moles
Explanation:
Given mass, m = 23.8 grams
Molar mass of Nitrogen = 14 g/mol
Let there is n number of moles. We know that,
No. of moles = given mass/ molar mass

So, there are 1.7 moles in 23.8 grams of Nitrogen.
Answer 15m
Explanation: Distance = Speed x Time
3 x 5 =15