Which information must be known about a compound to find the molecular formula from the empirical formula?
density
formula mass
percent composition
mole ratio
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marthie and return

Brad and his family like to go camping. they always take a gas lantern with them. the lantern can take fiuels but always puts out the same amount of light. brad has two different kinds of fuel for the lantern. how can he figure out which kind of fuel has more chemical energy that the lantern can turn into light? measure the brightness of the lantern using each kind of fuel by comparing it to the full moon. g measure the volume of the containers of fuel. measure how long the lantern stays lit on a fixed amount of fuel. measure the mass of each container of fuel using a balance scale. answer 12

Iknow the answer is a but i don't know why

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.