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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

<em><u>Rhyolite and Andesite are examples of an extrusive igneous rock. </u></em>

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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When iron metal reacts with sulfuric acid, it produces iron (III) sulfate and hydrogen gas. Balance the equation: Fe + H2SO4 → F

gavmur [86]

<h3>Answer:</h3>

Balanced Equation; 2Fe + 3H₂SO₄ → Fe₂(SO₄)₃ + 3H₂
Why balance?: To obey the law of conservation of mass
Subscripts can not be changed, since they show the actual number of atoms of each element in a compound.

<h3>Explanation:</h3>

The balanced equation for the reaction between the iron metal and sulfuric acid to produces iron (III) sulfate and hydrogen gas is given by;

2Fe + 3H₂SO₄ → Fe₂(SO₄)₃ + 3H₂

Balancing chemical equations ensures that they obey the law of conservation of mass which requires the mass of reactants and the mass of products to be equal.
Balancing is done by putting coefficients on reactants and products while not affecting the subscripts as subscripts show the actual number of atoms of an element in a compound.

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3 years ago

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Lera25 [3.4K]

Answer: Option (A) is the correct answer.

Explanation:

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For example, the compound HCl has a covalent bond between the hydrogen and chlorine atom. As hydrogen atom has 1 valence electron and chlorine atom has 7 valence electrons.

So, in order to attain stability both these atoms will share their valence electrons and hence, a covalent bond is formed.

On the other hand, when an electron is transferred from one atom to another then it tends to form an ionic bond.

For example, the compound NaCl has an ionic bond.

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