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kodGreya [7K]
2 years ago
13

Balance the following equations 1.Na+HCI=NaCI+H22.Mg+O2=MgO​

Chemistry
1 answer:
liberstina [14]2 years ago
7 0

Answer:

1. 2Na + 2HCl = 2NaCl =H2

2. 2Mg + O2 = 2MgO

Explanation:

make sure that the number of atoms of each element is the same on each side of the equation  

1. 2Na + 2HCl = 2NaCl =H2

<em><u>on LHS of equation,</u></em>

Na = 2

H = 2

Cl =2

<em><u>On RHS of equation, </u></em>

Na=2

H= 2

Cl =2

2. 2Mg + O2 = 2MgO

<em><u>on LHS of equation,</u></em>

Mg = 2

O2 = 2

<em><u>On RHS of equation, </u></em>

Mg = 2

O2 = 2

<em><u /></em>

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Answer:

\large \boxed{5.5 \times 10^{22}\text{ molecules of P$_{2}$O}_{5}}

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\text{Moles of P$_{4}$O}_{10} = \text{13 g P$_{4}$O}_{10} \times \dfrac{\text{1 mol P$_{4}$O}_{10}}{\text{283.89 g P$_{4}$O}_{10}} = \text{0.0458 mol P$_{4}$O}_{10}

2. Moles of P₂O₅

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\text{Moles of P$_{2}$O}_{5} = \text{0.0458 mol P$_{4}$O}_{10} \times \dfrac{\text{2 mol P$_{2}$O}_{5}}{\text{1 mol P$_{4}$O}_{10}} = \text{0.0916 mol P$_{2}$O}_{5}

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