Which of the following is true about petroleum?

O It emits harmful radiation.

O It is the most expensive fuel.

O It produces greenhouse gases.

O It provides a clean source of energy.

Find the molality of the solution if 25.0 g of methyl alcohol (CH3OH) are dissolved in 300 g of water.

An average copper penny minted in the 1960s contained about 3.000 g of copper. how much chalcopyrite had be mined to produce 100 pennies?

Destiny is the measure of what A. How much mass is in a substance B. How much volume is in a substance C. How much mass per unit of volume is in a substance

Which is a characteristic of a solution? Its particles scatter light. Its particles are evenly distributed. Its particles settle out. It has large suspended particles.

What is a boundary between geologic units? geologic map geologic unit contact fault line

Which of the following is true concerning the noble gases? A. Their highest occupied s and p sublevels are filled. B. They belong to Group 8A. C. They are sometimes referred to as the inert gases. D. all of the above

Which of the following is responsible for passing albinism from a parent organism to its offspring?

Rubidium has two naturally occurring isotopes, rubidium - 85 (atomic mass = 84.9118 amu; abundance = 72.15%) and rubidium - 87 (atomic mass = 86.9092; abundance = 27.85%). Calculate the atomic weight of rubidium

You are asked to analyze an aqueous solution (X) and determine what's in it. You pour some of your sample X into a test tube and add a few drops of an acid. No observable reaction occurs.

Which of the following items represents a chemical change? burning melting evaporation freezing