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mixer [17]
3 years ago
8

What is the main cause of earthquakes?

Chemistry
1 answer:
Ahat [919]3 years ago
5 0

Answer:

movement in tectonic plates. or volcanic eruptions.

Explanation:

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I just randomly remembered my 9 year old sister telling my 14 year old crush that he looks like and elf... she goes "You're like
iVinArrow [24]

Answer:

thats pretty epic

Explanation:

6 0
3 years ago
Read 2 more answers
For the reaction of oxygen and nitrogen to form nitric oxide, consider the following thermodynamic data (Due to variations in th
CaHeK987 [17]

Answer:

a. 7278 K

b. 4.542 × 10⁻³¹

Explanation:

a.

Let´s consider the following reaction.

N₂(g) + O₂(g) ⇄ 2 NO(g)

The reaction is spontaneous when:

ΔG° < 0  [1]

Let's consider a second relation:

ΔG° = ΔH° - T × ΔS° [2]

Combining [1] and [2],

ΔH° - T × ΔS° < 0

ΔH° < T × ΔS°

T > ΔH°/ΔS°

T > (180.5 × 10³ J/mol)/(24.80 J/mol.K)

T >  7278 K

b.

First, we will calculate ΔG° at 25°C + 273.15 = 298 K

ΔG° = ΔH° - T × ΔS°

ΔG° = 180.5 kJ/mol - 298 K × 24.80 × 10⁻³ kJ/mol.K

ΔG° = 173.1 kJ/mol

We can calculate the equilibrium constant using the following expression.

ΔG° = - R × T × lnK

lnK = - ΔG° / R × T

lnK = - 173.1 × 10³ J/mol / (8.314 J/mol.K) × 298 K

K = 4.542 × 10⁻³¹

7 0
3 years ago
Oxidation number of Mg3N2
Fudgin [204]

Answer:

n=-3

Explanation:

Mg = +2  

3(+2) + 2N = 0  

N = -3

8 0
3 years ago
PLEASE ANSWER
vodka [1.7K]

Answer:

  • <u><em>B. Negative association</em></u>

<u><em></em></u>

Explanation:

<em>Negative association</em> is when the independent and dependent variables move in opposite directions: if the dependent variable increases, the independent variable decreases, and if the dependent variable decreases, the independent variable increases.

As you see in the diagram, as you move to the right on the horizontal axis, meaning that the independent variable is increasing, the points lie lower, meaning that the independent variable decreases.

Therefore, if you draw a line of best fit, it will have a negative slope. A negative slope indicates <em>negative association.</em>

The graph certainly shows association as there is a clear trend; else the points would be randomly dispersded.

7 0
3 years ago
An unknown material has a mass of 5.75 g and a volume of 7.5 cm3.
Shtirlitz [24]

Hey there!:

Mass = 5.75 g

Volume = 7.5 cm³

Therefore:

Density = mass / volume

D = 5.75 / 7.5

D = 0.7 g/cm³

Answer C

Hope that helps!

3 0
3 years ago
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