The red is an oxygen molecule. 1 oxygen and 2 hydrogen =h2o or water!
THey can move around each other instead of just vibrating in place like solid prticles.
A.) Hydroxide ion is the negative ion found in bases.
C.) Color change occurs during neutralization reaction.
Hope this helps!
The empirical formula is obtained by calculating the mole ratios of the atoms in the elements.
The number of moles =mass/ R.A.M
For hydrogen, no. of moles=8/1=8
For oxygen, no. Of moles=64/16=4
The tabular solution is attached.