When an electron moves from a lower to a higher energy level does the electron gain or lose Quantum of energy

What is the theoretical yield of sodium oxide (Na₂O) in grams when 20.0g of calcium oxide (CaO) reacts with an excess amount of Sodium chloride? 2NaCl+CaO->CaCl2+Na2O The 2 at the end of the equation is not a coefficient it's for Na2. 10.0g 22.1g 32.

Why would you use more than one indicator to determine the ph of a solution?

How is friction involved in sledding and skiing?

Which is a characteristic of colloids? are homogeneous mixtures have large dispersed particles will settle out over time are made up of at least two substances

Calcula la densidad de un cuerpo que tiene la masa de 12g y un volumen de 3cm^3 dar el resultado en unidades del SI por favor ayuda

Calcium and sulfur ionic compound or non ionic?

Which of the following would release the most heat upon cooling from 75°C to 50°C?

Chlorine atoms each have 17 protons. How many neutrons does each Cl-37 atom have? A. 17 B. 20 C. 37 D. 54

Which choice can be a solid, liquid, or a gas? A. steel B. silver C. water D. carbon dioxide

How to convert 0.000984 into scientific notation?