Consider the reaction: Mg(OH)₂ (s) ⇌ Mg²⁺ (aq) + 2 OH⁻ (aq)
At equilibrium, a 1.0 L reaction vessel contains 5.3 moles of Mg(OH)₂ and concentrations of 0.0080 M and 0.010 M of Mg²⁺ and OH⁻ respectively. What is Kc for this equilibrium?

Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2al(s)+3cl2(g)→2alcl3(s) what is the maximum mass of aluminum chloride that can be formed when reacting 32.0 g of aluminum with 37.0 g of chlorine? express your answer to three significant figures and include the appropriate units.

Particles vibrate in a rigid structure and do not move relative to their neighbors.

Calculate the frequency of a wave in a spring toy. the wave has a speed of 1.1 meters per second and a wavelength of 0.1 meters. *