The number of atoms of hydrogen are in 1 mole of Dimethylnitrosamine (CH3)2N20 will be 3 atoms.
The atoms are the smallest unit of the molecule or the compound which takes participate in the bond formation with any other atom or molecule compound they are always present in the whole number.
In Di-methyl lnitros amine (CH3)2N20 there are 3 atom of hydrogen attached with the methyl group of the carbon with is further bounded to the dinitro oxide which is another compound as it is forming the intermolecular hydrogen bond with it.
Therefore, number of atoms of hydrogen are in 1 mole of Dimethylnitrosamine (CH3)2N20 will be 3 atoms.
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