A 0.1888 g of a hydrocarbon samples is combusted and produces 0.6260 g CO2 and 0.1602 g H2O. What is the empirical formula for this compound? (Note a hydrocarbon only contains carbon and hydrogen.)

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?

What type of electromagnetic waves does the human eye see as the colors red blue or green a visible light waves b radio waves c infrared waves d microwaves