What do you know about periodic tables ?

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

Calculate the frequency of a wave in a spring toy. the wave has a speed of 1.1 meters per second and a wavelength of 0.1 meters. *

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.