Which of these is true of a chemical reaction

a. Energy is either released or absorbed.

b. Energy is always absorbed.

c. Energy is always released.

d. Energy is not transferred.

What type of energy do chemical bonds have? What type of energy is it converted to during chemical reactions? A. chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. B.

The most massive star known in the universe is thought to be R136a1, which may be as much as 256 times the mass of our sun. What do R136a1 and our sun have in common? A) They have the same amount of helium. B) They have the same amount of hydrogen.

How many Earths will we need to have enough resources if the whole world lived like Americans?

Which trait is common to both science and pseudoscience?

Why mercury can remain for one or two years in the atmosphere without reacting?

What is the concentration when 0.065 moles of NaNO3 are dissolved in enough water to make 150.0 mL of solution?

What are the reactants and products of cellular respiration and photosynthesis?

Which situation would probably NOT result in the formation of new species? A) The introduction of a predatory fish that only eats the largest native bass in a Georgia lake.

How many electrons are present in outermost shell of argon atom

Why is there a difference between sodium and potassium in the reactivity with water