Which of the following terms best describes the heart's function in a living organism?

A.

a pump

B.

a sponge

C.

a lock

D.

a lever

What causes the pH of water to be 7.0? (A) The amount of H + ions is greater than the amount of OH - ions. (B) The amount of H + ions is less than the amount of OH - ions. (C) The amount of H + ions is equal to the amount of OH - ions.

Atom A has seven electrons in its outer shell. Atom B has one electron in its outer shell. They react and bond. Now both atoms have eight electrons in their outer shells. What kind of bond has formed?

How can we reduce our carbon footprint

The concentration of a substance involved in a reaction changes from 4.0 M to 2.0 M in 40 minutes. Is the substance a reactant or a product?

Which bag held the most vibrant beads? Question 1 options: The bag with no suncreen The bag covered in SPF 30 sunscreen The bag covered in SPF 70 sunscreen

Consider the statement, In the following process, the number of particles increases, so ΔS for this process must be positive. MgS (s) ⇄ Mg2 + (aq) + S2 - (aq) Is this statement true?

How do you read a data table?

In the manufacturing process of sulfuric acid, sulfur dioxide is reacted with oxygen to produce sulfur trioxide.

What is the pH of a solution with hydrogen ion concentration of 1 x 10^-6 M?

What fraction can be used in conversion of 32 m3 to mm3