Draw structure of oxygen, nitrogen &methane.​

What is the molarity of a solution that is prepared by adding 57.1 g of toluene (c 7 h 8 ) (density = 0.867 g/ml) to a 250 ml volumetric flask, and then filling to the mark with benzene (c 6 h 6 ) (density = 0.876 g/ml)?

Classify each statement about effective nuclear charge, zeff, as true or false.

How many molecules of sucrose c12h22o11 are there in 454 grams of sucrose