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?

A sample of gas has a mass of 0.0707 grams and has a volume of 48.9 milliliters. What is the density of this gas?

Convert: 20.9 mL = ___L 2.09 0.209 0.0209 209 20.9

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