Why is coal regarded as a mixture and a pure substance

Which among the following electromagnetic radiations have the lowest frequency? Microwave Infra-red Ultra-violet Visible light

Name the noble gas atom that has the same electron configuration as each ion in the compound rubidium oxide

Moseley's changes to the periodic table were based mainly on what part of the scientific process? observation of the elements< - - - my answer, correct? argumentation among scientists existing knowledge about mass competition among scientists

Which of the following is not a vector?

The nucleus of an atom contains what subtomatic particle

What is the theoretical empirical formula of magnesium oxide

8. which change in state is associated with the heat of vaporization, 1. solid to liquid 2. liquid to vapor 3. solid to vapor 4. liquid to solid

A mixture of calcium carbonate, CaCO3, and barium carbonate, BaCO3, weighing 5.40 g reacts fully with hydrochloric acid, HCl (aq), to generate 1.39 L CO2 (g), mea sured at 50°C and 0.904 atm pressure.

Which of the following is the major advantage of using geothermal energy instead of using coal energy? Choice: You will get a brainliest! If your correct! A. More abundant than coal B. Easier to access than coal C. Releases less carbon dioxide D.

Why can equilibrium not be reached in reversible enzymatic rxn?