What does the number 4 in #4H_2O# tell you?
1 Answer
May 23, 2017
4 moles of.....
Explanation:
The number preceding a chemical formula in an equation relates to the number of moles of that substance that is reacting.
For example:
means that 2 moles of hydrogen gas and 1 mole of oxygen gas react to form 2 moles of water.
