Convert 85.02g to mg (1 mg=10^-3g)

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

What reaction is taking place? 02 + c3h8 = h20 + co2