qual é a massa,em gramas,de uma molécula do etano (C2H6):
A) 18 g
B) 30 g
C) 6,0 X 10²³
D) 5,0 X 10²³
E) 0,2 x 10²³
A) 18 g
B) 30 g
C) 6,0 X 10²³
D) 5,0 X 10²³
E) 0,2 x 10²³
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