How many moles of heptane will completely react with 1.42 of molecular oxygent

The defining characteristic of deserts is their high daytime temperatures. true or false?

Describe how adding and removing solute affects the concentration of a solution. Describe how adding and removing solvent affects the concentration of a solution. How does water dissolve salt easily, but not sugar?

How many grams of MgCl2 (molar mass = 95.20 g/mol) will be formed from 25.6 mL of a 0.100 M HCL solution reacting with excess magnesium metal? (The other product is hydrogen gas.)

A mass of 34 grams and a volume of 5.2cm^3

When were the bohr model and the quantum-mechanical model for the atom developed? what purposes do these models serve?

A particular alloy is made of two metals. The density of one of the metals (call it metal A) is 3.0 g/cm3. The density of the other metal (call it metal B) is 5.0 g/cm3. If the density of the alloy is 4.

Who determined that the elements needed to be arranged by atomic number instead of atomic mass?

How many molecules are in 4.50 moles of water

N aqueous solution of sodium hydroxide is standardized by titration with a 0.154 m solution of hydrochloric acid. if 17.5 ml of base are required to neutralize 17.6 ml of the acid, what is the molarity of the sodium hydroxide solution?

Consider the positions of barium (Ba), sulfur (S), silicon (Si), and calcium (Ca) on the periodic table. The atoms of which element require the least amount of energy to give up an electron when forming chemical bonds?