Chemical reactions -

a. produce new substances.

b. create and destroy atoms.

c. occur only in living organisms.

d. only occur outside living organisms.

Using definitions, explain how the following terms are related to each other: Joule per second, Watt, kilowatt, horsepower.

This is a type of symbiotic relationship where both organisms benefit.

Which factor determines the atomic number of an atom? A) the number of protons plus the number of neutrons in every atom. B) the number of neutrons in two atoms of an element. C) the number of electrons in the outer layer of any atom.

A chemist wants a 0.100 M solution of NaOH. She has 0.0550 mol NaOH available. What volume of solution is needed to make the mixture? A. 0.0550 L B. 0.100 L C. 0.550 L

26.0 g of a liquid that has a density of 1.44 g/mL needs to be measured out in a graduated cylinder. what volume should be used

For the reaction n2 (g) + 2h2 (g) â n2h4 (l), if the percent yield for this reaction is 77.5%, what is the actual mass of hydrazine (n2h4) produced when 27.70 g of nitrogen reacts with 4.45 g of hydrogen?

A Which landmasses show evidence of ancient glaciers?

What is the molarity of a solution containing 5.0 moles of kcl in 2.0 l of solution?

Compare the electron configurations of hydrogen, lithium, and sodium. Why do you think these elements are grouped in the same family?

What is the theoretical yield of silver chloride?