Answer: No the given gas is not at STP.
Step-by-step explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number
of particles.
Standard condition of temperature (STP) is 273 K and atmospheric pressure is 1 atmosphere respectively.
Given temperature :
![23^C=(23+273)K=296K](https://img.qammunity.org/2020/formulas/chemistry/middle-school/t888s46c9vbjy0jybhlhyi6u47kfjfk4z7.png)
1 mole of every gas occupy volume at STP = 22.4 L
Thus at STP, the temperature is 273 K and pressure is 1 atmosphere and the given gas is not at STP.