Visible light with a wavelength of 4.7x10^-7 meters will have a frequency of

Which is true of chemicals? a. things containing chemicals always cost a lot of money. b. chemicals are never dangerous. c. chemicals are in many substances in a home. d. chemicals are rarely found on earth.

What is the temperature of one mole of helium gas at stp?

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.