Why must living things rely on thousands of catalysts for chemical reactions necessary for life?

Use the periodic table entry below to answer the following question. What is the atomic mass of the element cobalt (Co) ?

Three factors that affect the solubility of a substance are pressure, the type of solvent, and volume. Select one: True False

Ether has a density of 0.736 g/cm^3 at 20 degrees C. what is the volume, in liters, of 225.0 grams of ether?

A solution with a ph of 11 is first tested with phenolpthalein

Al2 (SO3) 3 what are the number of atoms

When does hail happen?

For the reaction, calculate how many moles of the product form when 0.012 mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Al (s) + 3O2 (g) →2Al2O3 (s) Express your answer using two significant figures.

Nuclei with too many or too few neutrons are?

Be sure to answer all parts. Enter the formula for potassium dihydrogen phosphate and determine its molecular (formula) mass.

g Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water. Suppose 2.71 g of ethane is mixed with 3.8 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction.