Write the empirical formula for the following compounds. a. CoHo
b. C3H18
c. WO2
d. C2H.02
e. X39Y13

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

What type of radiation is lead emitting in the following equation? alpha particles beta particles gamma rays