The molarity of a sodium hydroxide (NaOH) solution is 0.2 M. The molar mass of NaOH is 40 g/mol.

If the solution contains 20 g of sodium hydroxide dissolved in water, what is the volume of the solution?

0.4 L
2.5 L
0.25 L
4.0 L

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

i think   the answer is c hope i'm right

wher is the rest of the question