Why are water molecules polar? select one:

a. they contain two kinds of atoms.

b. the electrons in the covalent bonds spend more time closer to the oxygen nucleus.

c. the hydrogen bonds are weak.

d. they have covalent bonds?

What elements are required for a fire to happen?

Is battery acid a a. heterogeneous mixture b. homogeneous mixture

An aqueous solution at 25∘C has a hydronium ion concentration of 3.2*10-9 M. What is the hydroxide ion concentration of the solution? Write your answer in scientific notation. Use the multiplication symbol rather than the letter x in your answer.

What is the difference between fission and fusion?

A substance is found to consist of 1.900g of silver, 0.250g of nitrogen, and 0.850g of oxygen. what is the percent by mass of oxygen in the compound?

How many grams of KCl are produced when 60 grams of K are reacted?

Whats a solution! people

How do compounds affect an atom's stability

You need to make 10 mL of 2 mg/ml solution of protein and you have 25 mg/mL solution. How much protein solution and water do you need to mix in order to make the required solution?

The definition of volume is? a) width*height b) the space occupied by mass c) the space occupied by a liquid d) the mass of liquid required to fill a container