In which color coded area would you find an element that behaves both like a metal and a non-metal?
gray
green
blue
purple

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

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.

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.