If the pressure exerted on a sample of gas is increased from 0.89 atm to 3.56 atm what is the initial volume of the gas in ml if the final volume was 20.0 ml?

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

What is the mass of sodium in 3 moles of sodium chloride

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!