If you want to make 2 moles of Silver from the reaction below, how many grams of copper should you start with?

Reaction: Cu + 2AgNO3 → 2Ag + Cu(NO3)2

Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?

When the water vapor cools it condenses select a number that represents his process on the

How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)