In the reaction below, 22 g of H2S with excess O2 produced 4 g of sulfur.
? H2S + ? O2 -> ?S + ? H20.
What is the percent yield of sulfur?
Answer in units of %.

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon