Question

hey guys:-

detaild answer needed:-​

Answer 1

300 K = 26.85°C.  

Speed of sound at 26.85°C in helium = 1019 m/s.  

Speed of sound at 26.85°C in nitrogen = 353 m/s m/s.  

Ratio of speeds are 1019 / 353 = 2.8867.  

Answer 2

Explanation:

➡Magnesium (Mg) will react react with NaOH to liberate H2✔✔➡Magnesium (Mg) will react react with NaOH to liberate H2✔✔➡Magnesium (Mg) will react react with NaOH to liberate H2✔✔➡Magnesium (Mg) will react react with NaOH to liberate H2✔✔➡Magnesium (Mg) will react react with NaOH to liberate H2✔✔➡Magnesium (Mg) will react react with NaOH to liberate H2✔✔