How many atoms are there in 5.10 moles of sulfur?

5.10x(6.022x10^23)=3.07x10^24(Reference: Chang 3.13)2. How many moles of calcium (Ca) atoms are there in 77.4 g of Ca?(6 points)(Reference: Chang 3.15)77.4g Ca*1 mol/40.1gCa=1.93 mol Ca3.What is the mass in grams of 1.00 × 1012lead (Pb) atoms?(8 points)1.00x10^12x207.2/6.02x10^23=3.44gx10^-10(Reference: Chang 3.19)4.Describe how you would determine the isotopic abundance of an element from itsmass spectrum.(6 points)Mass Spectrometer(Reference: Chang 3.32)5.Cinnamic alcohol is used mainly in perfumery, particularly in soaps and cosmetics.Its molecular formula is C9H10O.a.Calculate the percent composition by mass of C, H, and O in cinnamic alcohol.

The velocity would be 2