Answer:
A mole (mol) is the amount of a substance that contains 6.02 × 10 23 representative particles of that substance. The mole is the SI unit for the amount of a substance. There are, therefore, 6.02 × 10 23 water molecules in a mole of water molecules. Water (H2O) is made from 2 atoms of hydrogen and 1 atom of oxygen.
Answer:
The are we made of matter?
The red end of the spectrum.
Answer:
Option B 180-210 ppm
Explanation:
C-13 NMR tells about the carbon skeleton and it is similar to proton NMR. Reference compound in C-13 NMR is tetramethylsilane (TMS) in which chemical shift of carbon is considered to be 0.0 ppm.
Chemical shift of carbon having different hybridization is different.
For example, chemical shift of sp3 hybridized carbon is in the region of 0 to 90 ppm.
Chemical shift of sp2 hybridized carbon is in the region of 110 to 220 ppm.
In aliphatic ketone, the carbolyl carbon atom is sp2 hybridized. So, C-13 chemical chemical shift range for carboly carbon is 110-220 ppm
Therefore, among the given option, option B is correct.
Properties of nascent oxygen:
1. Has one atom per molecule
2. Does not exist very long under normal conditions
3. Can form dioxygen
