Question

Standard temperature and pressure are defined as what?

Answer 1

See this site.

Explanation:

These days it's `273.15` `K`, and `100*kPa` `"(1 bar)"`. Depending on the curriculum, and the subject, different definitions pertain. Most older chemists would regret the passing of `1*atm` `=(101.3*kPa)` as a standard.