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vaieri [72.5K]
3 years ago
14

For the current reaction, 2NO2 ↔ N2O4, we have:

Mathematics
1 answer:
vivado [14]3 years ago
4 0
<h3>Answer:</h3>

\displaystyle K_c \approx 0.0424

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Chemistry</u>

<u>Equilibrium</u>

  • Equilibrium Constant K
  • Concentrations - Denoted in [Brackets]
<h3>Step-by-step explanation:</h3>

<u>Step 1: Define</u>

[RxN]   2NO₂ ⇆ N₂O₄

[Equilibrium Rate Law]   \displaystyle K_c = \frac{[N_2O_4]}{[NO_2]^2}

NO₂ = 11.95 M

N₂O₄ = 6.05 M

<u>Step 2: Find K</u>

  1. Substitute [ERL]:                    \displaystyle K_c = \frac{[6.05]}{[11.95]^2}
  2. Exponents:                            \displaystyle K_c = \frac{[6.05]}{[142.803]}
  3. Divide:                                   \displaystyle K_c = 0.042366
  4. Round (Sig Figs):                  \displaystyle K_c \approx 0.0424

This value of K tells us that the reactants are favored in the equilibrium reaction (K < 0.1).

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The Kirkland family is buying a new living room set that costs $1,495.
never [62]
<h3>Answer:   173.04 dollars</h3>

======================================================

Explanation:

The down payment is $400, so that means they must pay back 1495-400 = 1095 dollars. Let L = 1095 be the amount loaned

The annual interest rate is 28% which means r = 0.28; the monthly interest rate is i = r/12 = 0.28/12 = 0.02333 approximately

There are 12 months in a year, so n = 12 is the number of payment periods

----------------------------------------

In summary so far, we have

  • L = 1095
  • i = 0.02333 (which is approximate)
  • n = 12

Those values will be plugged into the monthly payment formula below

M = L*( i*(1+i)^n )/( (1+i)^n - 1 )

M = 1095*( 0.02333*(1+0.02333)^12 )/( (1+0.02333)^12 - 1 )

M = 105.671914631108

M = 105.67

The monthly payment is $105.67

If they have a monthly payment of $105.67, and they pay that for 12 months, then 12*105.67 = 1,268.04 dollars is the amount of money they pay back to the credit card company.

The total amount of interest would be 1,268.04 - 1,095 = 173.04 dollars

Side note: the formula is a complicated ugly mess, so it's understandable to use calculators that already have the formula built in. Many websites offer free calculators that do this.

7 0
3 years ago
I don’t get this at all can someone help?
aleksklad [387]

Reasons (In order):

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What is the sum of (1 - 80° - 15) and (2 + 12x – 3c)?
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Step-by-step explanation:

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Step-by-step explanation:

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