Which electron configuration represents an atom in an excited state?

(1) 2-7 (3) 2-8-1

(2) 2-6-2 (4) 2-8-8-2

How many grams of potassium iodine, kl, must be added to 500.0 grams of water to produce a 6.00% solution?

Why does the evaporation of sweat cool your body on a warm day

The diagram to the right shows energy for two reactions, A and B. Which reaction has the higher Gpx?. Which reaction has the higher activation energy?

How many moles of CH4 are in 32g of CH4?

What happens to water during evaporation? A) It turns gas as it cools. B) It turns to liquid as it cools. C) It turns to solid as temperature decreases. Eliminate D) It turns to gas as the temperature increases.

Which kind of dating can be used to determine the exact age of the rock and which kind of carbon dating is used to compare the ages of rocks?

Calculate the density of an object with a mass of 30g and volume of 6cm^3

What happens when light from the sun passes through any type of matter? the light slows down. the light speeds up. most of the light is absorbed. most of the light is reflected.

What is the chemical name for Fe (HCO3) 2

How are protons, electrons, and neutrons correctly compared