How many moles of ultra violet photons with a wavelength of 400nm does it take to equal the energy in 1.0 mole of infrared radiation of 1000nm?

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal. b. he is determining chemical properties that are sufficient to identify the metal. c. he is determining physical properties that are insufficient to identify the metal. d. he is determining chemical properties that are insufficient to identify the metal.

In which reaction is precipitation occurring?

What is the chemical formula for dihydrogen monoxide