Question: We did an experiment where we mixed a random metal (mine was manganese) with HCl to produce H gas. Will the following statements increase, decrease

We did an experiment where we mixed a random metal (mine was manganese) with HCl to produce H gas. Will the following statements increase, decrease or have no effect on the amount of hydrogen gas produced:

1. A lower mass of metal is used. 2. The atmospheric pressure increased. 3. The room temperature decreased. (ignore any changes to the water vapor pressure)

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