A cup contains 5 carbon atoms. Are the contents of this cup an example of a pure substance? Explain your answer.

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent