What is the balanced form of the chemical equation shown below?

Al (s) + O2 (g) → Al2O3 (s)

The identities of substances are the same before and after which type of change

How many grams of a 32.2% potassium sulfate solution would contain 610.1 g potassium sulfate?

Express the answer in scientific notation and with the correct number of significant figures: (6.32 x 10-4) : 12.64 Your answer should have the same number of significant figures as the starting measurement. 872.4 mm =

Is ice melting in a drink a chemical change?

A relativistic proton has a momentum of 1.0 * 10-19 kg · m/s and a rest energy of 0.15 nJ. What is the kinetic energy of this proton? (c = 3.00 * 108 m/s, mproton = 1.67 * 10-27 kg)

A Which landmasses show evidence of ancient glaciers?

What is the molarity of a solution containing 5.0 moles of kcl in 2.0 l of solution?

Compare the electron configurations of hydrogen, lithium, and sodium. Why do you think these elements are grouped in the same family?

What is the theoretical yield of silver chloride?

Calculate the cell potential for the galvanic cell in which the reaction Fe (s) + Au 3 + (aq) - ⇀ ↽ - Fe 3 + (aq) + Au (s) occurs at 25 ∘ C, given that [ Fe 3 + ] = 0.00150 M and [ Au 3 + ] = 0.797 M.