If i have about 68.2 grams of H2S, how many moles do i have?

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

Why is retrograde motion an apparent motion

What information does a complete ionic equation give that the balanced equation doesn’t show?