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Ion Electron Method

B2O3+ Mg → Mg...

Question

$B_{2} O_{3} + M g \to M g O + B$
According to the equation above. How many moles of magnesium would be required to react completely with 1 mole of $B_{2} O_{3}$ ? (Equation is not balanced)

0.2 mole

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0.3 mole

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1 mole

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2 mole

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3 mole

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Solution

The correct option is E 3 mole
$B_{2} O_{3} + M g \to M g O + B$

the balance equation will be:
$B_{2} O_{3} + 3 M g \to 3 M g O + 2 B$

Therefore 3 moles of Mg would be required to
react with 1 mote of $B_{2} O_{3}$ So answer will be (E)

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Similar questions

. . . S O_{2} (g) + . . . . O_{2} (g) \to . . . S O_{3} (g)

According to the above unbalanced equation, how many moles of $S O_{2} (g)$ will react completely with 1 mole of $O_{2} (g)$ ?

2 F e_{2} O_{3} + 3 C \to 4 F e + 3 C O_{2}

15.2

(I I)

C H_{3} O H

B

A + B O_{3} \to A_{3} O_{4} + B_{2} O_{3}

A_{3} O_{4}

1

A

1

B O_{3}

S_{2} O_{8}^{2 -} + I^{-} S O_{4}^{2 -} + I_{2}

N a_{2} S_{2} O_{8}

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