For the reaction SO3 + H20 --> H2SO4, how many grams of sulfuric acid can be produced from 200.g of sulfur trioxide and 100. g of water?

The answer for #3 is c but i don't know why

What is the mass of sodium in 3 moles of sodium chloride

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘