Which of the following is an essential condition for a redox reaction?

a. the reactants should be two elements.
b. the reactants should be two compounds.
c. the oxidation state of all the atoms should change.
d. the oxidation state of at least two atoms should change.

The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide

Light waves travel than sound waves.

Air can be considered a mixture. which statement does not explain why?