Problem: Consider the following reaction:4K(s) + O2 (g) → 2K2O(s)The molar mass of K is 39.09 g/mol and that of O2 is 32.00 g/mol.Without doing any calculations, pick the conditions under which potassium is the limiting reactanta. 170 g K, 31 g O2 b. 16 g K 2.5 g O2  c. 165 kg K 28, Kg O2 d. 1.5 g K 0.38 g O2 

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Estimate the ratio of O2 with K, O2 must be as minimum as possible over K

Analyzing the conditions

a. 170 g K, 31 g O2  → K is approximately 5x more than O

b. 16 g K, 2.5 g O2 → K is approximately 6x more than O2

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Problem Details

Consider the following reaction:

4K(s) + O2 (g) → 2K2O(s)

The molar mass of K is 39.09 g/mol and that of O2 is 32.00 g/mol.

Without doing any calculations, pick the conditions under which potassium is the limiting reactant

a. 170 g K, 31 g O2 

b. 16 g K 2.5 g O2  

c. 165 kg K 28, Kg O2 

d. 1.5 g K 0.38 g O2 

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