Similarities between mole and MOL

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

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

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.