Answer:
A chemical formula is an expression that shows the elements in a compound and the relative proportions of those elements.
Explanation:
If only one atom of a specific type is present, no subscript is used. For atoms that have two or more of a specific type of atom present, a subscript is written after the symbol for that atom
Answer: 
has aldehyde functional group.
Explanation:
Functional groups are specific group of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.
A. 
has ketone 
functional group .
B. 
has carboxylic acid 
functional group .
C. has aldehyde 
functional group .
D. 
has ester 
functional group .
Thus has aldehyde (CHO) group.
1.regulating ph
2.heating
3.adding some oppositely charged colloids
The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in any atom is its mass number minus its atomic number.
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Answer:
Self value and rational thinking.
Explanation:
If you don't want to fall in love with someone, list reasons as to why. Understand you're amazing and that you don't <em>need</em> to be with anyone. Self value is very important so you don't fall for people that you believe will support you better than you can.
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