Which of the following atoms has four valence electrons? beryllium (be) carbon (c) titanium (ti) potassium (k)

If 90.0 grams of ethane reacted with excess chlorine, how many grams of dicarbon hexachloride would form

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.