Answer:
m(C)=?
N(C)=6,45*10²²atom
N= n*Na n(C)=N/Na n(C)= 6,45*10²²/6,023*10²³ N(C)=0,1075mol
M(C)=12 n=m/M m(C)=0,1075mol*12g/mol m(C)=1,29g
Explanation:
We use two types of formulas: N=n*Na and n=m/M
N- number of atoms
Na- number of Avogadro 6,023*10²³
n- quantity of substance
m-mass of the substance
M-molar mass (for carbon is 12, we can find it in the Periodic sistem)
