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?

In general, when a substance changes from a solid to a liquid, A. the density of the substance increases. B. the substance no longer has density since density is a property only solids have. C. the density of the substance decreases. D.

1. What do the arrows in a food chain or food web represent?

What's the difference between kinetic energy and potential energy?

A materials ability to allow heat to flow is called?

Give me a paragraph about the sun

Consider the circuit 9.012 9.012 What is its equivalent resistance? Answer in units of 12.

out of 2.00 50 mL of water is added to 30 mL of a 0.50 M salt solution. What is the new concentration? (To write your answer using scientific notation use 1.0E-1 instead of 1.0 x 10-1)

If one object has more mass than another then it weighs more or less than the other object?

What is most believed by most scientists about the age of our solar system.

The water level in a graduated cylinder stands at 20.0 ml before and at 26.2 ml after a 16.74 g metal sample is lowered into the cylinder. what is the density of the sample. what metal is the sample most likely to be