How does the atmospheric pressure vary with height?

Which of these reactions are redox reactions? check all that apply. cd + hcl → cdcl2  + h2cucl2  + na2s → 2nacl + cuscaco3  → cao + co2          2zns + 3o2  → 2zno + 2so2          ch4  + 2o2  → co2  + 2h2o

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al