Calculate the frequency of the red light emitted by a neon sign with a wavelength of 690nm

What is enthalpy of atomisation

Sue has to find the empirical formula of a compound containing 81.8 grams of carbon and 18.2 grams of hydrogen in 100 grams of compound. What should her first step be?

Which phase of matter completely fills its container? A. Gas B. None of these C. Liquid D. All of these

Electric charge A. discovery b. Radiation c. electricity d. Kinetic energy

Maize, man, Goat, is an example of a food chain true or false

How could Cl change to gain stability? lose 7 electrons gain one electron

Connie was making sodium chloride by adding an acid to an alkali. She followed the progress of the reaction with a pH sensor. At which pH would she know that the acid and alkali had completely reacted to give a salt solution?

Yttrium - 90 has a half life of 64 hours. How much of a 120g sample will remain after 128 hours?

KOH is an Arrhenius and increases the concentration of when added to water. Blank 1:

Explain why the offsrping with Gg genes for pod color look the same as a pea plant with GG genes for pod color