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Reactivity with Dihydrogen (Group 1)

in a reaction...

Question

in a reaction A + B₂ gives AB₂ , identify the limiting reagent if 300 atoms of A reacts with 200 molecules of B₂.

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Solution

A + B₂--------> AB₂
1 atom + 1molecule ------> 1 molecule i.e. they react in 1:1 ratio

Though there are 300 atoms of A, there are only 200 moleucles of B₂ hence B₂is the limiting reagent.

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A + B₂ → AB₂

Identify the limiting reagent, if any, in the following reaction mixtures.

(i) 300 atoms of A + 200 molecules of B

(ii) 2 mol A + 3 mol B

(iii) 100 atoms of A + 100 molecules of B

(iv) 5 mol A + 2.5 mol B

(v) 2.5 mol A + 5 mol B

In a reaction A+B₂ ----------> AB₂

Identify the limmiting reagent if any in the following reaction mixtures.

1) 300 atoms of A+ 200 molecules of B

2) 2mol A+ 100 mol B

3) 100 atoms of A+ 100 molecules of B

4) 5 Mol of A+ 2.5 mol B

5) 2.5 mol A + 5 mol of B

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