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Gemiola [76]
3 years ago
5

In continuing to think about the rock cycle, we know the phases can take thousands, even millions of years to occur. Which stage

in the cycle can happen in mere hours or days?
a. Lithification and Erosion
b. Heat and pressure
C. Compaction and weathering
d. Cooling & Crystallization
Chemistry
1 answer:
TEA [102]3 years ago
5 0

Answer:

d. Cooling & Crystallization

Explanation:

One of the stages of the rock cycle that can take place under mere hours or days is cooling and crystallization.

Cooling and crystallization of lava on the earth surface is a very rapid and fast process.

When magma from within the earth reaches the surface, it becomes lava. Due to the nature of the surface, it cools rapidly and very fast to form very fine grained igneous rocks.

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Explanation:

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When a substance is heated ,the kinetic energy of its molecules
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How many miles are there in 20g of KClO3 (k=39 Cl=35.5 O=16)​
SashulF [63]
<h3>Answer:</h3>

0.144 moles

<h3>Explanation:</h3>
  • The relationship between mass of a compound, number of moles and molar mass of the compound is given by;
  • Number of moles = Mass ÷ Molar mass
  • Molar mass is equivalent to the relative formula mass of the compound that is calculated the atomic masses of the elements making the compound.

In this case;

Our compound, KClO3 will have a molar mass of;

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Mass of KClO3 is 20 g

Therefore;

Number of moles = 20 g ÷ 138.5 g/mol

                            = 0.144 moles

Thus, the number of moles in 20 g of KClO3 is 0.144 moles

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