Explain the meaning of the word electromagnet

Physical change is one that affects the physical properties of a substance true or false

The change in entropy, Δ S ∘ rxn, is related to the the change in the number of moles of gas molecules, Δ n gas.

A decrease in temperature decreases A. The activation energy of the reaction B. The number of collisions between molecules C. The number of products in the mixture The reaction rate will A. Decrease B. Increase C. Remain constant

What are halogens, solid, liquid, or gas?

How many places are there electrons in the innermost shell of an atom

What is the formula for the ionic compound formed by magnesium and iodine?

Which organism lived on Earth during the Precambrian time? A. fern B. dinosaur C. cyanobacteria D. octopus

What is the concentration of chloride ion when 16.8ml of a 0.554 M solution of barium chloride is combined with 16.8ml of a 0.593M of aluminum chloride?

A chemist measures the amount of fluorine gas produced during an experiment. she finds that 76.9 g of fluorine gas is produced. calculate the number of moles of fluorine gas produced.

The job of the human heart is to circulate blood through all of the body's arteries, capillaries, and veins. The job of the human lungs is to supply the small amount of blood in them with oxygen.