Observable matter makes up about what percentage of the universe? 5% 10% 50% 95%

Convert 3.57 moles of aluminum to grams

Carbon-14 is particularly useful for radioactive dating. true or false?

The difference of a number X and 1/2 (how to write it out?)

Water has a K, value of 1x 10-13 1x 10-10 1x 10-15 1x 10-14

What is the chemical formula for silver nitrate

The electron configuration 1s22s22p63s23p6 represents which noble gas?

What are some disadvantages of incinerators?

What mass of potassium chlorate would contain 40grams of oxygen?

Identical forces act for the same length of time on two different masses. The change in momentum of the smaller mass is A) smaller than the change in momentum of the larger mass, but not zero. B) zero.

How many nuclei of 238 92 U 92 238 U remain in a rock if the activity registers 290 decays per second? (Note that the half life of Uranium-238 is 4.468x109 years)