Log ind
WAEC - Chemistry (1995 - No. 4)
What is the percentage by mass of copper in copper in copper (l) oxide (CU
2
O)? [O = 16; CU =64]
88.9%
80.0%
66.7%
20.0%
11.1%
Kommentarer (0)
Log ind for at kommentere
Reklame
Tillad, at javascript indlæser denne side korrekt
