The density of a pure substance is its mass per unit volume. The density of hexane has been measured to be 655. g/L. Calculate the mass of 555.mL of hexane. Be sure your answer has a unit symbol and the correct number of significant.

How many grams of mgbr2 are needed to produce 75g or metal?

The bone of a dinosaur and the imprint of a leaf are examples of which kind of fossils? a) index b) body c) amber d) trace

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.