Answer:
1.) 2 Mg + H₂ ------> 2 MgH
2.) 2 K + O₂ -----> 2 KO
3.) K + S -----> KS
4.) 2 Ba + Br₂ -----> 2 BaBr
5.) 2 Ca + N₂ ------> 2 CaN
Explanation:
An equation is balanced when there is an equal amount of each element on both sides of a reaction. If there is an unequal amount, they can be altered by adding coefficients which modify the amount of an element/molecule. It is important that the coefficients are as small as possible while staying as whole numbers.
1.) ------------------------------------------------------------------------------------------------------
The unbalanced equation:
Mg + H₂ -----> MgH
Reactants: 1 magnesium, 2 hydrogen
Products: 1 magnesium, 1 hydrogen
The balanced equation:
2 Mg + H₂ ------> 2 MgH
Reactants: 2 magnesium, 2 hydrogen
Products: 2 magnesium, 2 hydrogen
2.) ------------------------------------------------------------------------------------------------------
The unbalanced equation:
K + O₂ -----> KO
Reactants: 1 potassium, 2 oxygen
Products: 1 potassium, 1 oxygen
The balanced equation:
2 K + O₂ -----> 2 KO
Reactants: 2 potassium, 2 oxygen
Products: 2 potassium, 2 oxygen
3.) ------------------------------------------------------------------------------------------------------
The unbalanced equation:
K + S -----> KS
Reactants: 1 potassium, 1 sulfur
Products: 1 potassium, 1 sulfur
This equation is already balanced with all the elements/compounds having coefficients of 1.
4.) ------------------------------------------------------------------------------------------------------
The unbalanced equation:
Ba + Br₂ -----> BaBr
Reactants: 1 barium, 2 bromine
Products: 1 barium, 1 bromine
The balanced equation:
2 Ba + Br₂ -----> 2 BaBr
Reactants: 2 barium, 2 bromine
Products: 2 barium, 2 bromine
5.) ------------------------------------------------------------------------------------------------------
The unbalanced equation:
Ca + N₂ ------> CaN
Reactants: 1 calcium, 2 nitrogen
Products: 1 calcium, 1 nitrogen
The balanced equation:
2 Ca + N₂ ------> 2 CaN
Reactants: 2 calcium, 2 nitrogen
Products: 2 calcium, 2 nitrogen
