What is valency and valence electron?​

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

Compare and contrast refraction of light and sound will give brainliest