Answer:
Alphabet C :NADH is oxidized,CO2 is reduced
Answer:
45 joules to calories= 10 (10.755258) calories
The balanced chemical reaction is expressed as:
M + F2 = MF2
To determine the moles of the element fluorine present in the product, we need to determine the moles of the product formed from the reaction and relate this value to the ratio of the elements in MF2. We do as follows:
moles MF2 produced = 0.600 mol M ( 1 mol MF2 / 1 mol M ) = 0.600 mol MF2
molar mass MF2 = 46.8 g MF2 / 0.6 mol MF2 = 78 g/mol
moles MF2 = 46.8 g ( 1 mol / 78 g ) = 0.6 mol
moles F = 0.6 mol MF2 ( 2 mol F / 1 mol MF2 ) = 1.2 moles F
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. But 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. What I'm saying is, the stoichiometric coefficients are the basis of our reaction rate orders. For this reaction, the rate order is 2 for NO₂, 1 for F₂ and 2 for NO₂F. When the forward and reverse reactions are in equilibrium, then it applies that:
Reaction rate of disappearance of reactants = Reaction rate of formation of products.
Therefore, we can have two reaction rate constants for this. But since the conditions manipulated are the reactant side, let's find the expression for reaction rate of disappearance of reactants.
-r = k[NO₂]²[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. As you can notice the stoichiometric coefficients are exponents of the concentrations of the reactants. Let's say initially, there are 1 M of NO₂ and 1 M of F₂. Then,
-r = k(1)²(1)
-r = k
Now, if we change 1 M of NO₂ by increasing it to its half, it would now be 1.5 M NO₂. Then, if we quadruple the concentration of F₂, that would be 4 M F₂. Substituting the values:
-r = k(1.5)²(4)
-r = 9k
So, as you can see the reaction rate increase by a factor of 9.
Answer:
b. 1150 mmHg
General Formulas and Concepts:
<u>Chemistry - Gas Laws</u>
Gay Lussac Law - 
- P₁ is Pressure 1
- T₁ is Temperature 1 in Kelvin
- P₂ is Pressure 2
- T₂ is Temperature 2 in Kelvin
Explanation:
<u>Step 1: Define</u>
P₁ = 1.40 atm
T₁ = 12°C
P₂ = unknown
T₂ = 35°C
<u>Step 2: Identify Conversions</u>
1 atm = 760 mmHg
K = °C + 273.15
<u>Step 3: Convert</u>
P₁ = 1.40 atm = 1064 mmHg
T₁ = 12°C = 285.15 K
T₂ = 35°C = 308.15 K
<u>Step 4: Find P₂</u>
- Substitute:
- Cross-multiply:
- Multiply:
- Isolate P₂:
- Divide:
- Rewrite:
<u>Step 5: Check</u>
<em>We are given 3 sig figs. Follow sig fig rules and round.</em>
1149.82 mmHg ≈ 1150 mmHg
