Answer: Option (a) is correct.
Explanation:
Molecules of sugar given =
According to Avogadro's number it is known that 1 mole contains .
Therefore, calculate the moles of sugar present in the sample as follows.
Number of moles =
= 0.25 mol
Thus, the moles of sugar present in the sample is 0.25 mol.
Answer:
Answers are bellow.
Explanation:
The element with electron configuration 1s22s22p63s1 belong I A group in the periodic table and it is sodium because it loses one electron.
We have periodic table in attachments.
Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell, which it readily donates, creating a positively charged ion—the Na+ cation. Its only stable isotope is 23Na.
The free metal does not occur in nature, and must be prepared from compounds.
It is soft metal, reactive and with a low melting point.
