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Triss [41]
3 years ago
12

I need help rearranging the following formulas to solve for the requested variable please

Chemistry
1 answer:
shtirl [24]3 years ago
8 0

Answer :

Part (e): C_2=\frac{C_1\times P_2}{P_1}

Part (f): P_2=\frac{C_2\times P_1}{C_1}

Part (g): \text{Volume}=\frac{\text{Mass}}{\text{Density}}

Explanation :

Part (e):

The given expression is:

\frac{C_1}{P_1}=\frac{C_2}{P_2}

Now rearranging the the terms, we get:

C_2=\frac{C_1\times P_2}{P_1}

Part (f):

The given expression is:

\frac{C_1}{P_1}=\frac{C_2}{P_2}

Now rearranging the the terms, we get:

P_2=\frac{C_2\times P_1}{C_1}

Part (g):

The given expression is:

\text{Density}=\frac{\text{Mass}}{\text{Volume}}

Now rearranging the the terms, we get:

\text{Volume}=\frac{\text{Mass}}{\text{Density}}

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Problem page gaseous ethane ch3ch3 will react with gaseous oxygen o2 to produce gaseous carbon dioxide co2 and gaseous water h2o
iVinArrow [24]

m(\text{CO}_2) = 2.24 \; \text{g}

Ethene react with oxygen at a 2 : 7 molar ratio:

2\; \text{C}_2 \text{H}_6 (g) + 7\; \text{O}_2 (g) \to 6\; \text{H}_2{O} (g) + 4\; \text{CO}_2 (g)

Convert the quantity of each reactant supplied to number of moles of particles:

  • n(\text{C}_2\text{H}_6) = 0.60 \; \text{g} / 28.05 \; \text{g} \cdot \text{mol}^{-1} =  0.0214 \; \text{mol}
  • n(\text{O}_2) = 3.27 \; \text{g} / 32.00 \; \text{g} \cdot \text{mol}^{-1} =  0.102 \; \text{mol}

The question stated not whether both reactants were used up in this process. Thus start by testing the assumption that e.g., ethene was used up while some oxygen gas were left unreacted (ethene as the <em>limiting </em>reagent.) Under this assumption, the relative availability of the two species, n(\text{C}_2 \text{H}_6) /2 and n(\text{O}_2) /7 (as seen in the balanced chemical equation) shall satisfy the relationship

n(\text{O}_2) / 7 - n(\text{C}_2 \text{H}_6) / 2 > 0

In other words,

n(\text{O}_2)/7 > n(\text{C}_2 \text{H}_6)/2

n(\text{C}_2 \text{H}_6) / n(\text{O}_2) < 2/7 \approx 0.286

Evaluating the expression n(\text{C}_2 \text{H}_6) / n(\text{O}_2) with data given in the question yields approximately 0.210 < 0.286, which does satisfy the relationship. Hence the assumption holds and ethene is the limiting reactant.

The quantity of a reactant produced in a chemical reaction is related to its stoichiometric (of relating to proportions) relationship with the limiting reactant (or any of the reactants in case of more than one limiting reactant.) For this scenario, given the molar ratio n(\text{C}_2\text{H}_6) : n( \text{CO}_2) = 2:4,

n(\text{CO}_2) = n(\text{C}_2\text{H}_6) \cdot (2 / 4) = 0.0510 \; \text{mol}

m(\text{CO}_2) = 0.0510 \; \text{mol} \times 44.01 \; \text{g} \cdot  \text{mol}^{-1} = 2.24 \; \text{g}

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Na +H₂O- NaOH +H₂ balance
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