Carbon-14 has a half-life of 5,730 years. Suppose a fossil from a mammal contains one-fourth of its original amount of carbon-14. How old is the sample?

Can you create the needed environment on earth to stop an atom completely

What element has the strongest pull on its electrons?

What is the percent yield of a reaction in which 200. g of phosphorus trichloride reacts with excess water to form 91.0 g of hcl and aqueous phosphorous acid (h3po3) ?

Which statement about gases is true? They are made up of particles that always move very slowly. They are made up of particles that travel in a curved path when in motion. They are made up of hard spheres that vibrate quickly in stationary positions.

Beryllium has one more electron than lithium. Can this additional electron fit in the 2s subshell?

A 2.00 L container of gas has a pressure of 1.00 atm at 300 K. The temperature of the gas is halved to 150K, and the measured pressure of the same 2.00 Liter sample is 0.420 atm.

How many moles of ZnCl, will be produced from 23.0 g of Zn, assuming CuCl, is available in excess?

Glaciation in Alaska is a result of interactions between which of the following "spheres"? Check all that apply. A. biosphere B. exosphere C. geosphere D. cryosphere E. atmosphere F. hydrosphere

In the following equation: FeCl3 + O2 = Fe2O3 + Cl2, what is the limiting reactant if 4 moles of FeCl3 react with 4 moles of O2?

What are some special effects you can make with dry ice?