How many atoms in 12 moles of oxygen

Start an single atom tab. observe the decay of polonium-211. after each decay, press the reset nucleus button to watch the process again. write a description of alpha decay for po-211

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?