Calculate the mass of 6.45 x 10^22 atoms of carbon

Chemistry

1 answer:

ludmilkaskok [199]3 years ago

5 0

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)

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