How many molecules are in h2o2

Galaxies are composed of many different objects. What kind ok objects make up most of the visible matter in a galaxy?

If you knew the valence electrons in a nonmetal atom, how who you determine the valence of the element?

For most of the 1900s, the legs voting age was

How many milliliters of 0.15 M solution could you prepare?

You are a forensic scientist working for a police department. One piece of evidence from your current case is a letter written in a strange ink. You must separate the pigments in the ink to determine what it is made from.

Given the reaction 2NaOH + H2SO4 = Na2SO4 + 2H2O, what is the total number of grams of NaOH needed to react completely with 196 grams of H2SO4

The mass flow rate of gasoline leaving a refinery is 1610 kg/min. The specific gravity of a gasoline is 0.700. A retail gasoline pump is able to fill a 20.0 gallon automobile tank in 1.80 minutes.

Calculate the solubility of cux (ksp=[cu2+][x2-]=1.27*10-36) in a solution that is 0.190 m in nacn.

An atom has seven valance electrons which element could have this type of atom

How is the ocean important to human survival? restate the question