What are likely formulas for the following molecules? supply the missing digit. choose 1 if the element appears in the formula as a single atom. hydrogens are bonded to the preceeding atom in the formula. (c) chnh (b) ch-cl (a) ch-oh 3

The question is incomplete. Here I copy the complete question with the missing information:

What are likely formulas for the following molecules. Supply the missing digit.

Choose 1 if the element appears in the formula a a single atom.

Hydrogens are bonded to the preceeding atom in the formula:

(a) CH?OH:

(b) CH?Cl₂: ___

(c) CH₃NH?

This is, you must choose the subscript number that replaces the question mark (?) in each chemical formula.

(a) CH?OH:    3  

(b) CH?Cl₂:    2  

(c) CH₃NH?:  3  

Explanation:

(a) CH? OH:

The carbon atom may have up to 4 bonds. In alcohols one OH radical subsittute one H atom.

So, in methane, CH₄, by replacing on H by one OH group, it is obtained the alcohol CH₃OH.

So, the corresponding subscript for the H atom is 3.

(b) CH? Cl₂:  

Starting, again, with methane molecule, CH₄, some H atoms may be replaced by halogen atoms to form halide compounds.

So, when you replace two H atoms with two Cl atoms you obtain the compound CH₂Cl₂, whose name is methylene chloride or dichloromethane.

Then, the corresponding subscript for the H atom is 2.

(c) CH₃NH? :  3  

Amines is the general name of the organic compounds where one hydrogen atom is substituted by the amino group NH₃.

So, when one H atom in CH₄ is substituted by NH₃, the compound obtained is CH₃NH₃, whose name is methylamine.

Thus, the missing subscript for the H atom is 3.

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the answer is d. 74.02