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3 years ago

Which of the following is an example of an extrusive igneous rock? A. rhyolite B. granite C. andesite D. coal

Chemistry

2 answers:

asambeis [7]3 years ago

6 0

Rhyolite and Andesite are examples of an extrusive igneous rock.

Further Explanations:

Igneous rock also termed as magmatic and among one of the three types of rocks formed by the freezing and solidification of rocks are rocks formed partial melts of the planets mantle or crust. The process of formation of the igneous rocks would have occurred either by the increase in temperature or by decreases in pressure or by the change in configuration of the soil. These processes occur either on the surface of extrusive rocks or below the intrusive rocks and can form layer covering upto16 km of Earth’s crust volume.

As mentioned above that the extrusive rocks are formed by the deposition of the flow out magma from inside the Earth violently on the surface of the Earth. These extorted magma cools down more quickly on lad than in seawater and within a short time interval led to the formation of Crystals. Rhyolite and Andesite are examples of such igneous rocks.

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Answer Details

Grade: High School

Subject: Geography

Chapter: Volcanoes

Keywords: Igneous rock,magmatic,freezing, solidification,mantle, crust,extrusive rocks,intrusive rocks,magma, seawater,Rhyolite,Andesite

Inga [223]3 years ago

3 0

according to my text book the answer is rhyolite. It says when lava hardens, the rocks that forms are called extrusive and the rhyolite in figure 6b is extrusive. Lava is similiar to magama exedpt that in lava most of the gases have escaped sorry about spelling computer wont' let me backspace.

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Which statement describes what is gained or lost during radioactive decay?

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Answer:

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3 years ago

Pairs

BabaBlast [244]

Atoms are made up of protons, neutrons, and electrons.

Energy can be neither created nor destroyed.

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The correct pairing of the given terms are obtained from the given options as follows:

Atoms of elements contains three sub-atomic particles which are protons, neutrons, and electrons.

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According to the law of conservation of energy, Energy can be neither created nor destroyed.

Water is a liquid which freezes at 0°C.

Therefore, Water freezes at 0°C.

Platinum is a metal which is less reactive than hydrogen, Hence, it cannot displace hydrogen from acids.

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In conclusion, the correct pairing gives the correct description of the properties of the given terms.

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2 years ago

1. NaOH mass of a solution of 200g in which its percentage is 25%. What mass of sulfuric acid solution is needed to completely n

Ede4ka [16]

Answer:

$m_{H2SO4$ = 61.25 g

$m_{Na2SO4}$ = 88.75 g

Explanation:

$m_{NaOH}$ = $\frac{200 . 25 }{100}$ = 50 g

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2NaOH + H2SO4 ⇒ Na2SO4 + 2H2O

2 : 1 : 1 : 2

1.25 (moles)

⇒ $n_{H2SO4}$ = 1.25 × 1 ÷ 2 = 0.625 (moles) ⇒ $m_{H2SO4}$ = 0.625 × 98 = 61.25 g

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3 years ago

When 1 mol of KBr(s) decomposes to its elements, 394 kJ of heat is absorbed. (a) Write a balanced thermochemical equation.

VladimirAG [237]

The balanced thermochemical equation is

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The chemical equation for the decomposition of potassium bromide to its constituent elements bromine ans potassium :

KBr ----- K + Br2

The balanced thermochemical equation of the decomposition of potassium bromide to its constituent elements potassium and bromide as follows

KBr ------- K + 1/2 Br2

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2 years ago

Which of the following is an example of a model? PV=nRT, Geographical map, I believe that aliens exist, all of the above.

aleksandrvk [35]

Answer: The correct answer is geographical map.

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3 years ago

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