Which is not a direct classification of matter? a. Element
b. Homogenious Mixture
c. Mixture
d. Pure Substance

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?

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

When balancing a chemical equation: