Tobias placed a marble with a density of .5 g/cm in a graduated cylinder containing 9ml of water. What is the mass of the marble?

Litmus paper is made from water-soluble dyes which are extracted from lichens. this paper is used as an acid-base indicator. which of these common household substances would turn blue litmus paper red? a) bleach b) lye c) soap d) vinegar

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.