A rock has a mass of 13.0 g and displaces a volume of 3.9 mL of water in a graduate cylinder. What is the density of the rock? (write your number to 2 places after the decimal)

Ta shell can hold a maximum of 32 electrons, what is the value of n?

How are evaporation and condensation related?

A certain element forms an ion with 54 electrons and a charge of + 2. identify the element.

What role does sea water play in the water cycle?

The length of time required for half of the radioactive atoms in a sample to decay is its a. half-life. b. relative date. c. radioactive date. d. period

What fraction of carbon 14 remains in an animal frozen in a glacier 18000 years ago?

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number

Give 3-5 pieces of evidence to support why cloning is bad.

Nitrogen combines with oxygen to form nitrogen monoxide (no) and nitrogen dioxide (no2). a sample of no consists of 1.14 g of oxygen and 1 g of nitrogen.

The modern periodic table reflects many improvements to Mendeleev's original table. If Mendeleev's table was incorrect, why is it still studied in chemistry classrooms today?