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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In the laboratory you are asked to make a 0.694 m copper(II) iodide solution using 455 grams of water. How many grams of copper(

insens350 [35]

Answer:

100.2g of CuI₂ you must add

Explanation:

Molality, m, is defined as the ratio between moles of solute and kg of solvent.

In the problem, you have a 0.694m of copper (II) iodide -CuI₂, molar mass: ‎317.35 g/mol-. That means there are 0.694 moles of CuI₂ per kg of water.

As you have 455g = 0.455kg of water -solvent-, moles of CuI₂ are:

0.455kg ₓ (0.694 moles CuI₂ / kg) = 0.316 moles of CuI₂

Using molar mass, grams of CuI₂ in the solution are:

0.316moles CuI₂ ₓ (317.35g / mol) =

3 0

4 years ago

Given the reaction: N2 + O2 = 2NO for which the Keq at 2273 K is 1.2 x 10-4

MAXImum [283]

<u>Answer:</u>

(a): The expression of equilibrium constant is $K_{eq}=\frac{[NO]^2}{[N_2][O_2]}$

(b): The equation to solve the concentration of NO is $[NO]=\sqrt{K_{eq}\times [N_2]\times [O_2]}$

(c): The concentration of NO is 0.0017 M.

<u>Explanation:</u>

The equilibrium constant is defined as the ratio of the concentration of products to the concentration of reactants raised to the power of the stoichiometric coefficient of each. It is represented by the term $K_{eq}$