calculate the percent composition of a carbonate-bicarbonate mixture if a 0.508 g sample of this mixture is heated according to the above equation and a 0.386 g residue remains

Awoman's basketball has a circumference between 28.5 and 29.0 inches and a maximum weight of 20 ounces (two significant figures). what are these specifications in units of centimeters and grams?

What is the mass of oxygen gas is consumed in a reaction that produces 4.60mol so2

Determine the ph of 0.10 m nh3 solution. nh3 is a weak base with a kb equal to 1.8 x 10-5 round answer to nearest whole number.