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?

I you add 78g KBr to a final volume of 500mL, what would the final concentration be?

How does the opening of the soda container affect the solubility of the carbon dioxide? Describe the law that explains this.

From Earth, the moon looks like it changes shape. This is caused by the moon's: gravitational pull tilted axis rotation revolution

Some elements are not listed in the periodic table? True or False?

Should fitness professionals recommend the total elimination of fat from the diet? A. Yes, because all fats can lead to various diseases. B. No, but it's recommended that fat intake be limited to 30 percent of daily total calories. C.

c. When we heat water up by the Bunsen burner, what temperature is the boiling water? After 10 minutes

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?