Brent Faiyaz- Make luv... No words

Identify the lewis acid in this balanced equation: ag+ + 2nh3 -> ag(nh3)2+a. ag+b. nh3c. ag(nh3)2+

Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it