The complying with quantities are placed in a container: 1.5 × 1024 molecules of diatomic hydrogen, 1.0 mol that sulfur, and 88.0 g of diatomic oxygen.

You are watching: Determine the number of sulfur atoms in 27.1 g of molecular sulfur (s8).

What is the full mass in grams because that the repertoire of all three elements? What is the total variety of moles that atoms because that the 3 elements? If the mixture of the three elements formed a compound v molecules that contain two hydrogen atoms, one sulfur atom, and four oxygen atoms, which substance is consumed first? How many atoms or molecules of each remaining aspect would stay unreacted in the adjust described over ? Answer a

4.98 g H2, 32 g S; 124.98 g total

Answer b

2.49 mol H2, 2.75 mol O2; 6.24 mol total

Answer c

S is the limiting reactant (what would be consumed first)

Answer d

8.978 × 1023 molecule of H2 and 4.6 × 1023 molecule of O2 remain

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PROBLEM (PageIndex2)

What is the limiting reactant in a reaction that produces sodium chloride indigenous 8 g the sodium and also 8 g of diatomic chlorine?


The limiting reactant is Cl2

PROBLEM (PageIndex3)

Which that the postulates of Dalton"s atomic theory explains why we deserve to calculate a theoretical yield because that a stclairdrake.netical reaction?


Postulate 4 (A compound consists of atom of 2 or much more elements an unified in a small, whole-number ratio. In a given compound, the number of atoms of every of its facets are constantly present in the very same ratio).

PROBLEM (PageIndex4)

A student isolated 25 g the a compound following a procedure that would certainly theoretically productivity 81 g. What was his percent yield?


(mathrmPercent: yield = 31\%)

PROBLEM (PageIndex5)

A sample of 0.53 g of carbon dioxide was derived by heater 1.31 g that calcium carbonate. What is the percent yield for this reaction?


(mathrmPercent: yield = 91.9\%)

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PROBLEM (PageIndex6)

Freon-12, CCl2F2, is ready from CCl4 through reaction v HF. The other product the this reaction is HCl. Outline the actions needed to recognize the percent productivity of a reaction the produces 12.5 g the CCl2F2 from 32.9 g of CCl4. Freon-12 has been banned and also is no much longer used together a refrigerant because it catalyzes the decomposition of ozone and also has a really long life time in the atmosphere. Determine the percent yield.


(ceg: CCl4 ightarrow mol: CCl4 ightarrow mol: CCl2F2 ightarrow g: CCl2F2)

(mathrm:percent: yield=48.3\%)

PROBLEM (PageIndex7)

Citric acid, C6H8O7, a component of jams, jellies, and fruity soft drinks, is ready industrially via fermentation the sucrose by the mold Aspergillus niger. The equation representing this reaction is

What mass of citric mountain is developed from exactly 1 metric ton (1.000 × 103 kg) the sucrose (C12H22O11) if the productivity is 92.30%?


1036 kg citric acid

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PROBLEM (PageIndex8)

Toluene, C6H5CH3, is oxidized by wait under closely controlled conditions to benzoic acid, C6H5CO2H, i m sorry is used to prepare the food preservative sodium benzoate, C6H5CO2Na. What is the percent productivity of a reaction the converts 1.000 kg that toluene come 1.21 kg the benzoic acid?


(mathrmpercent: yield=91.3\%)

PROBLEM (PageIndex9)

In a laboratory experiment, the reaction that 3.0 mol the H2 with 2.0 mol of I2 developed 1.0 mol that HI. Identify the theoretical productivity in grams and also the percent yield for this reaction.


512 g (theoretical yield); (mathrmpercent: yield=25\%)

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PROBLEM (PageIndex10)

What is the limiting reactant when 1.50 g the lithium and 1.50 g that nitrogen incorporate to type lithium nitride, a ingredient of progressed batteries, according to the complying with unbalanced equation?


<1.50g: ceLi imes dfrac1: mole: ceLi6.94g: ceLi imesdfrac2: mole: ceLi3N6:mole: ceLi = 0.0720: moles: ceLi3N>

<1.50g: ceN2 imes dfrac1: mole: ceN228.02g: ceN2 imesdfrac2: mole: ceLi3N1:mole: ceN2 = 0.107: moles: ceLi3N>

(ceLi) is the limiting reactant

PROBLEM (PageIndex11)

Uranium can be isolated native its ores by dissolving it as UO2(NO3)2, then separating it together solid UO2(C2O4)·3H2O. Enhancement of 0.4031 g of salt oxalate, Na2C2O4, to a solution containing 1.481 g of uranyl nitrate, UO2(NO3)2, yields 1.073 g of heavy UO2(C2O4)·3H2O.

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Determine the limiting reactant and also the percent yield of this reaction.


Na2C2O4 is the limiting reactant. Percent yield = 86.6%

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PROBLEM (PageIndex12)

How plenty of molecules of C2H4Cl2 can be all set from 15 C2H4 molecules and 8 Cl2 molecules?


Only 8 molecules deserve to be formed

PROBLEM (PageIndex13)

How many molecules of the sweetener saccharin have the right to be all set from 30 C atoms, 25 H atoms, 12 O atoms, 8 S atoms, and 14 N atoms?

determine the number of sulfur atoms in 27.1 g of molecular sulfur (s8).