Объяснение:
1. Li₂O
w (Li) = (2·7) / (2·7+16) · 100% ≈ 46,67%
w (O) = 16 / (2·7+16) = 100 - 46,67 ≈ 53,33%
2. NaOH
w (Na) = 23 / (23+16+1) · 100% = 57,5%
w (O) = 16 / (23+16+1) · 100% = 40%
w (H) = 1 / (23+16+1) · 100% = 2,5%
Объяснение:
1. Li₂O
w (Li) = (2·7) / (2·7+16) · 100% ≈ 46,67%
w (O) = 16 / (2·7+16) = 100 - 46,67 ≈ 53,33%
2. NaOH
w (Na) = 23 / (23+16+1) · 100% = 57,5%
w (O) = 16 / (23+16+1) · 100% = 40%
w (H) = 1 / (23+16+1) · 100% = 2,5%