It would be 23.46, since the next number is a 5 so we can round up.
Significant figures are:
ANY number that is not 0
Any 0 between two nonzero digits
Any 0 following a decimal (i.e 1.50)
Yes it is. Copper is the same mass and volume. Plus all pennies are made of copper
Chemical energy is stored within atoms
Protons/Electrons: 92
Neutrons: 140
***REMEMBER: There is always the same amount of protons and electrons. :)
Answer to this is O-atom.
Explanation: The Bronsted acid-base theory is the backbone of chemistry. This theory focuses mainly on acids and bases acting as proton donors or proton acceptors.
where
is the Lewis Acid and
is the Lewis Base and
is the Covalent Bond.
Reaction of dissociation of
in
is given as:

In this reaction O-atom has lone pair in water and therefore it accepts the proton from
forming a Lewis Base.