Which kind of experiments can i do in my house

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

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.

What is the mass of phosphorous in a 51-kg person