It mean it consisted of 1 g of lead and 0.077 g of O2.
divide these numbers by molar mas.
1/82=0.012 Pb /0.004 = 3
0.077/16= 0.004 O /0.004 =1
Pb3O
Because a copper ion looses electrons, meaning it's negatively charged, and positives and negatives attract.
CH₃-CH=CH₂ propene
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