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777dan777 [17]
3 years ago
10

What is plate tectonics?

Chemistry
2 answers:
Alexandra [31]3 years ago
7 0
Plate tectonics is the theory that Earth's crust is composed of many plates that are moving slowly over time. 

Your answer is D. :)
Kazeer [188]3 years ago
6 0
What is plate tectonics?<span>a. The theory that Earth's surface does not change.
b. The theory that Earth's surface will eventually become hotter over time.
c. The theory that the thickness of Earth's crust will even out over time and become flat.
d. The theory that Earth's crust is composed of many plates that are moving slowly over time.

This is the theory of plate tectonics :D 
</span><span />
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2. What is the difference between an element and a compound?​
melamori03 [73]

Answer:

element.

.it is pure substance composed of only one type of atoms.

.the number of element is more than 118.

compound.

.a compound is composed of atoms of two or more elements.

.the number of compound is very large in comparison of elements.

hope it help

6 0
2 years ago
En un matraz, disponemos de 100 g de gas oxígeno que se encuentran a 1 at de presión y 273 K de temperatura. Calcular : a) el nú
Misha Larkins [42]

Answer:

Explanation:

Dado que:

masa de oxígeno gaseoso = 100 g

presión = 1 atm

temperatura = 273 K

(a)

número de moles de oxígeno contenidos en el matraz = masa de oxígeno / masa molar de oxígeno

= 100 g / 16 gmol⁻¹

= 6.25 moles

(b) El número de moléculas de oxígeno es el siguiente:

Dado que 1 mol de oxígeno gaseoso contiene 6.023 * 10²³ moléculas de oxígeno.

Entonces, 6.25 moles contendrán:

= (6.25 ×  6.023 * 10²³) moléculas de oxígeno.

≅ 3.764 × 10²³ moléculas de oxígeno.

(c) El número de átomos de oxígeno es:

= 2 × 3.764 × 10²³

= 7.528 × 10²³ átomos de oxígeno

(d) Usando la ecuación de gas ideal

PV = nRT

El volumen ocupado por el oxígeno = \dfrac{nRT}{P}

Volumen ocupado por oxígeno = \dfrac{ 6.25 * 8.314 *273}{1}

Volumen ocupado por oxígeno= 14185.76 m³

3 0
3 years ago
What are the phases of the moons all of them not just 3
levacccp [35]

<u>Number 1</u>

~ The New Moon

<u>Number 2</u>

~ Waxing Crescent

<u>Number 3</u>

~ First Quarter

<u>Number 4</u>

~ Waxing Gibbous

<u>Number 5</u>

~ Full Moon

<u>Number 6</u>

~ Waning Gibbous

<u>Number 7</u>

~ Last Quarter

<u>Number 8</u>

~ Waning Crescent

7 0
3 years ago
What will happen when additional reactants are added to a system at equilibrium ?
Pachacha [2.7K]
Additional reactants would break equilibrium
5 0
3 years ago
Read 2 more answers
How many grams of i2 are needed to react with 30.1 g of n2h4?
Nina [5.8K]

The reaction is,

H2S + I2 --------------> 2 HI +S

Molar weight of H2S = 34 g per mol

Molar weight of HI =128 g per mol

Molar weight of I2 =254 g per mol

Moles of H2S in 49.2 g  = 49.2 /34 mol = 1.447 mol

So according to stoichiometry of the reaction, number of I2 mols needed                      

                                  = 1.447 mol

The mass of I2  needed = 1.447 mol x 254 g

8 0
3 years ago
Read 2 more answers
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