10 points and brainliest for the first to answer!

water is made up of two atoms and one atom.
a oxygen, hydrogen
b sodium, hydroxide
c hydrogen, oxygen
d carbon, oxygen

How many bones are there in the human body?

Achange in which factor will affect the rate of reaction only when gases are involved? temperature pressure surface area concentration

There are two tomato plantlets one of them is kept in an oxygen chamber with a light source and another is kept in sunlight. both of them are watered regularly what will be the observation after two weeks