Which chemical is the limiting reagent in this series of reactions? why?
0.020mol A + 0.20mol B -> 0.020mol C
0.1mol D + 0.020mol chemical C -> 0.040mol Chemical E
0.1mol F + 0.040mol chemical E -> 0.020mol Chemical G
0.1mol H + 0.12mol chemical G -> 6.66mol Chemical I

Explanation:

0.020mol A + 0.20mol B -> 0.020mol C

0.1mol D + 0.020mol chemical C -> 0.040mol Chemical E

0.1mol F + 0.040mol chemical E -> 0.020mol Chemical G

0.1mol H + 0.12mol chemical G -> 6.66mol Chemical I

The limiting reagent in any chemical reaction is the one in short supply over the other.

To determine the limiting reagent, we need to first find the number of moles of each of the given reagents. This has been given in the stated problem.

The other reagent in excess is abundant in supply.

Limiting reagents determines the extent of chemical reactions.

Note: limiting reagents are reactants and only in the left hand side

0.020mol A        + 0.20mol B      ->     0.020mol C

   A is the limiting reagent here.

0.02mole of A is less than 0.2moles of B

0.1mol D   +    0.020mol chemical   C ->   0.040mol Chemical E

    C is the limiting reagent

  0.02mole is less than 0.1mole

0.1mol F + 0.040mol chemical E -> 0.020mol Chemical G

     E is the limiting reagent

 0.04mole of E is less than 0.1mole of F

0.1mol H   +      0.12mol chemical G ->    6.66mol Chemical I

    H is the limiting reagent

 0.1mole of H is less than 0.12mole of G

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periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.