Based on your experience in the simulation wat do the numbers 3 and 4 refer to in 3NH4

●3 refer to No. of molecule

There are 3 molecule of NH4

●4 refer to atom of hydrogen

since there are 3 molecules of NH4.Each molecule containing 4 H.Therefore there are 12 H atom in the compound

the solar system used to have much dust particles option no d

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.