HELP PLSSS!!! A person has a sample of butane (C4H10), and it has 60.85g of hydrogen in it. What is the total mass of the sample of butane in grams?

State the formula for density in words and mathematical symbols

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 an example of a physical property?