Calculate the average mass of these three samples: 104.2g, 3.21g, 29.0g.

Answer : The average mass of these three sample is 45.47 g

Explanation :

Average : It is defined as the sum of all the values divided by the total number of values.

As we are given the mass of three samples which are, 104.2 g, 3.21 g, 29.0 g

Now we have to determine the average mass of the given sample.

Therefore, the average mass of these three sample is 45.47 g

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.