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2 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]2 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]2 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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Sodium chloride can be produced by the reaction of sodium metal with chlorine gas. Which is the limiting reactant if 6.70 moles

Alecsey [184]

Answer:

Chlorine gas.

Explanation:

Hello!

In this case, the undergoing chemical reaction is:

$2Na+Cl_2\rightarrow 2NaCl$

Thus, given the moles of reacting both sodium and chlorine, we compute the moles of sodium chloride yielded by each reactant by considering the 2:2 and 1:2 mole ratios:

$n_{NaCl}^{by\ Na}=6.70molNa*\frac{2molNaCl}{2molNa}=6.70molNaCl \\\\n_{NaCl}^{by\ Cl_2}=3.20molCl_2*\frac{2molNaCl}{1molCl_2}=6.40molNaCl$

Thus, since chlorine yields less moles of sodium chloride, we infer it is the limiting reactant.

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