How many moles of sulfur dioxide are held inside a 67.4 L canister at a pressure of 0.25 atm and a temperature of 40.0 °C?

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

When the mercury level in a barometer decreases that atmospheric pressure has

Silver reacts with oxygen to produce silver oxide. (write balanced chemical equation and identify type of chemical reaction.)