A block of pine wood has a mass of 120 g and a volume of 300 cm3. What is the density of wood? (Show your work)

The answer is

Explanation:

The density of a substance can be found by using the formula

From the question

mass of wood = 120 g

volume = 300 cm³

So the density of the wood is

We have the final answer as

Hope this helps you

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.