Which set of values represents standard pressure and standard temperature? (1) 1 atm and 101.3 k(2) 1 kpa and 273 k(3) 101.3 kpa and o°c(4) 101.3 atm and 273°c

Standard Temperature and Pressure (STP) is 0 degree Celsius and 1 atm. We also know that 1atm= 101.3 kPa. Thus, set 3 is the best choice.
Hope that would help :))

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 !