What element has 21 neutrons, 20 electrons and 20 protons

Consider the balanced equation below. N2H4 + 2H2O2 → N2 + 4H2O What are the mole ratios of hydrazine (N2H4) to hydrogen peroxide (H2O2) and hydrazine to water? 1:2 and 1:4 1:3 and 1:4 1:2 and 3:5 1:3 and 3:5

In order to simulate epipelagic zone conditions in a model aquarium design, what light and temperature conditions would be required?

Why are noble metals for example Rhodium, Palladium, Platinum, and Iridium largely used in chemical manufacturing as heterogeneous catalyst?

Why was it necessary to measure the exact volume of distilled water used to dissolve the acid, as well as the exact volume of the solution transferredfrom the beaker to the Erlenmeyer flask?

During the bromination of methane, the free radical CH3• is generated. A possible terminating step of this reaction is the formation of C2H6 by the combination of two free radicals.

Which is an example of flow of heat through conduction

Which of the following is an extensive physical property of matter? volume viscosity odor density

When is Ksp determined for a system?

What is the average surface temperature of Uranus

Consider the following statements. A. Molecules of hot water have less kinetic energy than those of cold water. B. For most solids, solubility increases when temperature increases. C.