Aparticular compound has the empirical formula ch2o. its molar mass is 240.0 g/mol. predict the molecular formula for this compound.

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 mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Find the mass, in grams, of 5.00*10^23 molecules of f2