Which symbol can be used to indicate a chemical reaction that takes place in the presence of a catalyst?
350 degrees Celsius over a right-pointing arrow.
Upper P t over a right-pointing arrow.
0.5 a t m over a right arrow.
Delta over a right arrow.

Upper Pt over a right-pointing arrow.

Explanation:

Which symbol can be used to indicate a chemical reaction that takes place in the presence of a catalyst?

350 degrees Celsius over a right-pointing arrow.  NO. This indicates the temperature at which the reaction occurs.Upper Pt over a right-pointing arrow.  YES. This indicates that the element platinum (Pt) is being used as a catalyst.0.5 atm over a right arrow.  NO. This indicates the pressure at which the reaction occurs.Delta over a right arrow. NO. This indicates that the reaction requires heat to occur.

Hope you find the answer