The number of valence electrons found in an atom of a group a element is equal to

The recommended calcium intake for teenagers is 1300 mg per day. A glass of milk contains 305 mg of calcium. One glass contains a volume of 8 fluid ounces.

What is the mass of a sample of NH3 containing 7.20 * 1024 molecules of NH3? 161 grams 187 grams 203 grams 214 grams

There are a few common types of calorimeters used in the chemistry labs which one is used at constant pressure?

Atoms are matter of what

Can some balance the equation? FeBr3 + H2SO - -> Fe2 (SO4) 3 + HBr

Which is true about dissolving a polar substance in water? A) the solvent particles are all nonpolar molecules B) the solute particles are carried into the solution C) the solute particles have no attraction for the solvent molecules D) the solute

Which societal problem can be solved, in part, by scientists identifying areas of high biodiversity? A. reducing the amount of pollution B. finding affordable housing C. protecting the environment D. providing access to clean water

Brianna wanted to compare the densities of two different solids of the same size 6cm3 (same volume) to see which one was more dense. Solid A had a mass of 2 grams and Solid B had a mass of 0.5 grams.

Which type of bond is present within a water molecule

Every oxygen atom has 8 electrons. what can you learn from the electron configuration of oxygen