Which of the following has the smallest mass? Convert them all the grams first. O A. 4.0 x 10-6 g
O B. 4.0 x 109 ng
O C.4.0 x 10-2 micrograms
O D.4.0 x 10-3 kg
O E. 4.0 x 10-6 mg

i think it is d. e because the next one is igneous.

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.

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)