1.5 mole of a metallic element Y react with 12 g of oxygen to form an oxide. What is the simplest formula of the oxide?
A: YO
B: YO2
C: Y2O
D: Y2O3
Q2)
2.60 g of a metal X combine with 1.20g of oxygen to form an oxide in which the oxidation number of X is +3, What is the relative atomic
mass of X?
A: 11.6
B: 34.7
C: 52.0
D:104
(relative atomic mass of O =16.9)
我想要STEPS同 解釋 唔該哂=]
更新1:
點解2條 數入面計既係no.of mole of O而唔係no.of mole of O2 既?