Which chemical equation shows the dissociation of magnesium hydroxide? And please explain why I'm struggling with this much appreciated! Multiple Choice

Mg(OH)2 → Mg2+ + H2O + O2−

Mg(OH)3 → Mg3+ + 3OH−

Mg(OH)2 → Mg2+ + 2OH−

MgOH → Mg2+ + OH2−

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane

All of the following are part of the biosphere except

Which statement correctly describes the phosphate ion, ? it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.