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.

Adozen is 12, and your needing to calculate the weight of one medium egg, so i would do 21/12=1.75 per egg, and check your answer by doing 1.75 * 12= 21 : ) : ): ): ): ) i hoped i

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).