heat of combustion of a substance with initial mass of 100g combusts, final mass of 95g and releasing 2000kj of energy

What is the atomic structure for alcohol

The process of forming two DNA molecules from one is called ...

Two compounds are mixed and light is emitted, the color changes, and heat is liberated. Which activity has occurred? A. Chemical reaction B. Chemical mixture C. Chemical nucleus exchange D. Chemical compromise

tank contains helium gas at 490 mm Hg, nitrogen gas at 0.75 atm and neon at 520 torr. What is the total pressure in atm? 2.1 atm 0.55 atm 1.5 atm 5.1 atm 51 atm

Which is an example of mechanical weathering? A. Carbonic acid reacting with minerals in a rock B. An iron-containing rock becoming rusty at its surface C. Small rocks and pebbles falling down a slope D.

Woods synthetic products are derived from the natural resource.

You have reacted calcium nitrate with sodium chloride, sodium phosphate, and sodium oxalate. of the three reactions which ones would form a precipitate?

What is the ratio of molecules in: CH4 + 2O2 - > CO2 + 2H2O

A 390 mL solutions of 4.6 M HCl is left out over the weekend and 74 mL of solvent evaporates. What is the new concentration of HCl?

How many grams of NH3 can be produced from the reaction of 17.8 moles of H2 and a sufficient supply of N2? N2 + 3 H2 → 2 NH3