Question

question 7 (1 point)
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the correct formulas for manganese(ii)hydroxide and copper(ii)nitrate are:

1. mgo and con
2. mg(oh) and cono3
3. mn(oh)2 and cu(no3)2
4. mnoh and cuno3

Explanation:

• Manganese(II) hydroxide: Manganese has a +2 charge (\(Mn^{2+}\)), hydroxide ion is \(OH^{-}\). Using the criss - cross method (charge of cation becomes subscript of anion and vice - versa), the formula is \(Mn(OH)_2\).
• Copper(II) nitrate: Copper has a +2 charge (\(Cu^{2+}\)), nitrate ion is \(NO_3^{-}\). Using the criss - cross method, the formula is \(Cu(NO_3)_2\).

Answer:

1. \(Mn(OH)_2\) and \(Cu(NO_3)_2\)