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3 years ago

What is the overall reaction equation

Chemistry

1 answer:

MariettaO [177]3 years ago

6 0

Answer:

If m or n is zero, the reaction is zero order in A or B, respectively, and the rate of the reaction is not affected by the concentration of that reactant. The overall reaction order is the sum of the orders with respect to each reactant. If m = 1 and n = 1, the overall order of the reaction is second order

(m + n = 1 + 1 = 2).

Explanation:

You might be interested in

Platinum has atomic radius 139 pm and crystallizes with a face-centered cubic unit cell. Calculate its density.

Alex Ar [27]

The density of the unit cell of Platinum in a face-centered cubic unit cell is 2.88 × 10²⁴ g/m³

<h3>What is a face-centered cubic unit cell?</h3>

Face-centered cubic is a type of atom arrangement found in nature. A face-centered cubic unit cell is made up of atoms organized in a cube with a portion of an atom in each corner and six extra whole atoms in the middle of each cube face.

An fcc unit cell contains 4 atoms

The mass of an atom = molar mass/Avogadro's number

The mass of an atom = 195.084/6.022 × 10²³
The mass of an atom = 3.24 × 10²⁴ grams

Now, the mass of a unit cell = 3.24 × 10²⁴ × 4

The mass of a unit cell = 1.296×10²⁵ grams

In an FCC unit cell, the volume of a unit cell is:

$\mathbf{= \dfrac{16}{3}\pi r ^3 }$

Given that the atomic radius (r) = 139 pm

The volume of the FCC unit cell in platinum = $\mathbf{= \dfrac{16}{3}\pi (139) ^3 }$

= 44997978.24 pm³

= 4.49 m³

Therefore, the density of an FCC unit cell = mass of a unit cell/ volume of a unit cell

The density of a unit cell = 1.296×10²⁵ g/4.49 m³

The density of a unit cell = 2.88 × 10²⁴ g/m³

Learn more about Face centered cubic unit cells here:

brainly.com/question/26382596

7 0

2 years ago

A sample of N2O4(g) is placed in an empty cylinder at a certain temperature. It is allowed to decompose and form NO2(g). At equi

Bess [88]

Answer:

Part. press. NO₂ in equilibrium is 0.590 atm

Explanation:

First of all, we determine the equilibrium:

N₂O₄ (g) ⇄ 2NO₂ (g)

These is a system of two unknown values.

In the begining we have x pressure of N₂O₄ and no value for NO₂.

During the reaction, y pressure has been released from N₂O₄. As ratio is 1:2, 2y will be the value for the pressure of NO₂. So in the equilibrium we have:

N₂O₄ → x - y

NO₂ → 2y

Data from the excersise states that the total pressure is 1 atm so we know that the sum of partial pressures in a mixture, will be the total one. In the equilibrium, total pressure will be:

(x-y) + 2y = 1 atm

x + y = 1 atm

Let's make the expression for Kp

Kp = [Partial pressure NO₂]² / [ Partial pressure N₂O₄]

Kp = (2y)² / (x-y)

Kp = 4y² / (x-y)

We split the x value in the first equation:

x + y = 1 atm

x = 1 atm - y

x = 1 - y → we put this in the Kp expression

0.85 = 4y² / ( 1 - y - y)

0.85 = 4y² / 1 -2y

This is a quadractic equation

0.85 - 1.7y - 4y² = 0 where (a = -4, b = -1.7 c = 0.85)

(-b +- √(b² - 4ac)) / (2a)

(1.7 +-√((-1.7)² - 4 (-4) . 0.85) / 2 .(-4) → 0.295 = y

As [ Part. press. NO₂] in equilibrium is 2y → 0.295 . 2 = 0.590 atm

5 0

3 years ago

Which statements about scientific explanations are true? I. Scientific explanations must prove that a hypothesis is true. II. Sc

harina [27]

Answer: A

Explanation:

Because we make hypothesis to find an answer to our observation or question. So if the Hypothesis is correct then the then a scientific explanation proves that a hypothesis is true. We also need more data and evidence to explain a scientific theory or question. A scientific expirement should be tested by many scientists to see if the results are correct. The more scientists aprove and the more evidence we have, the more correct our expirement is.

((hope this helped!)

7 0

3 years ago

* GIVING BRAINLIEST*

sveticcg [70]

i think its double replacement if i'm not mistaken

6 0

3 years ago

qaws [65]

The answer is conduction

3 0

3 years ago

Read 2 more answers