Hello, can you guys please write me an explanation on the question below, the best answer will get brainliest

What is the temperature of one mole of helium gas at stp?

Compare and contrast refraction of light and sound will give brainliest

A650 ml sodium bromine solution has a bromide ion concentration of 0.245 m. what is the mass (g) of sodium bromide in solution? a) 103.b)0.00155.c)16400.d) 16.4.e) 0.159