a compound has the empirical formula of CH2. 250.0 mL of its vapor at STP weigh 0.960 g. what is its molecular formula

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?

1. list three scientific reasons cockroaches may fly.

In a reaction equation, where are the products located? a.) above the arrow b.) to the right of the arrow c.) to the left of the arrow d.) below the arrow