Which element is placed in the same period as ruthenium but has a higher atomic number than it?

The question is incomplete. Complete question is:
Which element is placed in the same period as ruthenium but has a higher atomic number than it?
bismuth
osmium
silver
zirconium

Correct answer is Silver.

Reason:
From the periodic table, it can be seen that, silver and ruthenium are placed in the same period i.e. 5th period of periodic table. But the atomic number of ruthenium is 44, while that of silver is 47. 

Ci think not

Since there is the same amount of agn03 in both silver chloride and silver nitrate they produce the same amount of moles. therefore silver chloride produces the same amount of silver nitrate, so your answer is 15.0 moles of silver nitrate. i hope this !