Final answer:
The formula of the lead oxide is PbO (lead (II) oxide).
Step-by-step explanation:
The formula of the lead oxide can be determined using the given information about the mass of lead and the lead oxide formed. From the information given, we know that 207 g of lead combines with oxygen to form 239 g of lead oxide. To find the formula, we need to determine the ratio of the mass of lead to the mass of oxygen in the lead oxide.
Mass of oxygen = Mass of the lead oxide - Mass of lead = 239 g - 207 g = 32 g
Now we can calculate the ratio of the mass of lead to the mass of oxygen:
Mass ratio = Mass of lead / Mass of oxygen = 207 g / 32 g = 6.46875
Since the formula of the lead oxide is PbO, we can conclude that the lead oxide is lead (II) oxide.