How much silver was in the solution if all of the silver was removed as Ag metal by electrolysis for 0.50 hr with a current of 1.00 mA​

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

What is the mass of 4 molecules of co2

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?