If a sample contains 21.2 g N, how many moles of N does it contain?

0.66 mol

1.51 mol

14.01 mol

297.01 mol

What is the density of carbon dioxide at stp? 46.0 g/l 22.0 g/l 5.09 * 10-1 g/l 1.96 g/l?

After Gerry mows his lawn, he often puts the grass clippings into his flower garden. How will this affect his garden? It will decrease the amount of carbon in the soil and decrease the amount of carbon dioxide released by decomposers.

Which method would be best to separate a mixture of sugar and water? separation by density separation by particle size filtration distillation

Which statement correctly describes a chemical reaction at equilibrium? (1) The concentrations of the products and reactants are equal. (2) The concentrations of the products and reactants are constant.

Which group of elements are the most important for living organisms?/ a. carbon, lead, and tin b. carbon, nitrogen, and oxygen c. boron, aluminum, and nitrogen d. arsenic, antimony, and oxygen

I need to know about mitosis and meiosis

What is sediment and debris, and what role does it play in the way sedimentary rock forms?

How do I convert 4,500mm to a m

A substance that permits the flow of electrons is a (n a. conductor b. insulator

The volume, in liters, of 538 g of CO2