When 6.25 grams of pure iron are allowed to react with oxygen, a black oxide forms. if the product weighs 8.15g, what is the empirical formula of the oxide?

A typical deposit of cholesterol, c27h46o, in an artery might have a mass of 3.9 mg. how many molecules of cholesterol are in this mass?

7.24 miles of Ag (PO4) 2

Determine whether each of the descriptions of matter describes a heterogeneous mixture, a homogeneous mixture, or a pure substance. a. two substances present; two phases present b. two substances present; one phase present c.

Gwhich is a better nucleophile in an aqueous solution? which is a better nucleophile in an aqueous solution? ro - rs - request answer part c which is a better nucleophile in dmso? which is a better nucleophile in? ro - rs-

Why are hydrogen bonds weaker than intermolecular bonds?

What is the ratio of al3 + ions to s2 - ions in a neutral compound 1:1 2:1 2:3 3:2

The use of fertilizers in agriculture has significantly altered several nutrient cycles including:

If 31.6 g of KMnO4 is dissolved in enough water to give 160 mL of solution, what is the molarity? AND what mass of oxalic acid, H2C204, is required to make 300 mL of a. 74 M solution?

From where do the kinetic tiles collect energy?

For the reaction 2Fe + 3Cl2 → 2FeCl3 which of the following options gives the correct reactant:reactant ratio? Fe:Cl2 = 1:1 Fe:Cl2 = 2:3 Fe:Cl2 = 3:2 Fe:FeCl3 = 1:1