It alwase equals the same amount of mass after the reaction
Answer:
The answer to your question is 1795.5 grams of CO₂
Explanation:
Data
mass of carbon dioxide = ?
mass of Octane = 571.3 g
Process
1.- Write the balanced chemical reaction
C₈H₁₆ + 12O₂ ⇒ 8CO₂ + 8H₂O
2.- Calculate the molar mass of octane and carbon dioxide
Octane = (12 x 8) + (16 x 1) =96 + 16 = 112 g
Carbon dioxide = 8[ 12 + 2(16)] = 352 g
3.- Use proportions to find the mass of carbon dioxide
112 g of Octane ---------------- 352 g of carbon dioxide
571.3 g of Octane ------------- x
x = (571.3 x 352) / 112
x = 201097.6 / 112
x = 1795.5 grams of CO₂
The reaction is:
2 NO₂ (g) + F₂ (g) ⇆ 2 NO₂F (g)
The stoichiometric coefficients of the substances balance out each other to obey the Law of Definite Proportions. Now, you have to note that determining the reaction rate expression is specific to a certain type of reaction. So, this are determined empirically through doing experiments. Sometimes in chemical reaction engineering, to make things simple, you assume that the reaction is elementary. This means that the order of a reaction with respect to a certain substance follows their individual stoichiometric coefficients. Bu there is no need for that assumption. It is already stated that the rate order is 1 with respect to F₂ and 2 if we talk about the overall order. You can determine the overall order if you add all the exponents in the expression. For this reaction, the reaction rate can be written as
Reaction rate of disappearance of reactants = Reaction rate of formation of products.
Therefore, we can have two reaction rate expressions for this. But since the problem specifies F₂, we focus on the reactants side. The expression would be
-r = k[NO₂][F₂]
The negative sign before r signifies the rate of disappearance. If it were in terms of the product, that would have been positive. The term k denotes for the reaction rate constant. That is also empirical. Now, the exponents of the reactants represent their rate order. Since F₂ is specified that order is 1, the exponent is also 1. Because the overall rate order is 2, then that means that the exponent of NO₂ is also 1.
<u>Answer:</u>
<em>The percentage error in the measurement is 2.4%
</em>
<u>Explanation:</u>
The measurement made by the student is .
But the actual value of density is
The formula to calculate percentage error is
percentage error =
Hence percentage error in this case is given by
<em>Percentage error =
</em>
<em>=
</em>
A physical quantities value will be determines by various quantities. If errors are made in measuring any of these quantities there will be error in the measurement of the final physical quantity as well.
Here density of a substance is a derived quantity determined by measuring mass and volume of that substance.<em> If errors are made in mass and volume measurements the density value will also be erroneous.
</em>
<span>A.vegetable soup -- because it's heterogeneous</span>