The balanced equation for the combustion of Hydrogen is:

2 H2 + O2 → 2H2O

How many moles of H2O will be formed from the complete reaction of 0.750 moles of O2?

0.375 mol

1.50 mol

2.67 mol

0.750 mol

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