Calculate the grams of ethane present in a sample containing 0.1821 moles if the molar mass of ethane is 30.067 g/mol.

Which is a character of nuclear fusion but not nuclear fission

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

What produces wave a)sound b) heats c)transfer of energy d)vibrations