There are two main ways that minerals are classified. Which identifies those two main ways?

2 answers:

6 0

A mineral is a naturally occurring inorganic crystalline solid that are the building blocks of rocks. Rocks are made up of different minerals. The most appropriate answer is c. crystal structure and economic value. Some minerals are classified as semiprecious or precious because of their economic value. Minerals such as diamonds and emeralds are precious and are very valuable.

prohojiy [21]3 years ago

6 0

Minerals are classified based on their physio chemical properties

The chemical properties are related to crystal structure

physical appearance of mineral defines its cost

so the minerals are classified based on crystal structure and economic value

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What is the molarity of the resulting solution when 23.640 g of Mn(ClO4)2 · 6 H2O are added to 200.0 mL of water? WebAssign will

drek231 [11]

Answer:

0.3267 M

Explanation:

To solve this problem, first we calculate how many moles of Mn(ClO₄)₂ are contained in 23.640 g of Mn(ClO₄)₂·6H₂O.

Keep in mind that the crystals of Mn(ClO₄)₂ are hydrated, and we need to consider those six water molecules when calculating the molar mass of the crystals.

Molar mass of Mn(ClO₄)₂·6H₂O = 54.94 + (35.45+16*4)*2 + 6*18 = 361.84 g/mol

Now we proceed to calculate:

23.640 g Mn(ClO₄)₂·6H₂O ÷ 361.84 g/mol = 0.0653 mol Mn(ClO₄)₂·6H₂O = mol Mn(ClO₄)₂

Now we divide the moles by the volume, to calculate molarity:

200 mL⇒ 200/1000 = 0.200 L

0.0653 mol Mn(ClO₄)₂ / 0.200 L = 0.3267 M

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