Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.

Calcium hydride (cah2) reacts with water to form hydrogen gas: cah2(s) + 2h2o(l) → ca(oh)2(aq) + 2h2(g) how many grams of cah2 are needed to generate 45.0 l of h2 gas at a pressure of 0.995 atm and a temperature of 32 °c?

How do scientists think that gravity affected the formation of our solar system?

All cells are made of four types of acids, lipids, proteins, and carbohydrates.