Question

Answer 1

2.

a, Gọi CTHH cần tìm là Na_xC_yO_z.

\(\Rightarrow x:y:z=\dfrac{43,4}{23}:\dfrac{11,3}{12}:\dfrac{45,3}{16}\approx2:1:3\)

→ CTHH: Na₂CO₃

b, Gọi CTHH cần tìm là Cu_xS_yO_z.

\(\Rightarrow x:y:z=\dfrac{32}{64}:\dfrac{16}{32}:\dfrac{32}{16}=1:1:4\)

→ CTHH: CuSO₄.

Answer 2

a) tổng kl mol là bn vậy bn?

\(b)CTHH:Cu_xS_yO_Z\\ n_{Cu}=\dfrac{32}{64}=\dfrac{1}{2}mol\\ n_S=\dfrac{16}{32}=\dfrac{1}{2}mol\\ n_O=\dfrac{32}{14}=2mol\\ \Rightarrow CTHH:CuSO_4\)