What would happen to the population of rabbits, if the population of foxes increased?

A compound has 39 g of potassium and 78 g of selenium. What is the mass ratio of potassium and selenium in the compound

Which type of eruption appears to be the more hazardous to humans?

When we add 2.0 g of a solute to a solution, the mass of the solution always increases by 2.0 g. If we add 2.0 mL or 2.0 cm3 the volume does not increase by the same amount. Why not? Briefly explain.

A pitcher pitches a ball to a waiting batter and the batter hits a pop fly deep into the outfield where it is caught. Which of these has the most kinetic energy? A. the baseball right as it hits the bat B. the baseball right as it leaves the bat C.

Which of the following is a mixture? a.) Mercury b.) Alcohol c.) Ink d.) Water

A major component of gasoline is octane. When liquid octane is burned in air it reacts with oxygen gas to produce carbon dioxide gas and water vapor. Calculate the moles of carbon dioxide produced by the reaction of of oxygen.

Which of the following statements about transition metals is true? a. They are never found uncombined in nature. b. They include familiar metals such as gold, silver, copper, and nickel. c.

Elements can be separated from one another. Question 6 options: True False

One gram of lipid yields about 9kcal of energy. that is due to the high abundance of which chemical element?

Which of the following happens during a chemical change? Check all of the boxes that apply 0 One atom or more changes into atoms of another element. New substances with different properties are formed. O Solids, liquids, or gases may form.