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3 years ago

Rocks are grouped according to

1 answer:

8 0

<h2>Rocks are grouped according to their formation into three major groups – igneous, sedimentary, and metamorphic rocks </h2>

Explanation:

Based on their formation, rocks are further sub-grouped as:

Igneous - Intrusive or extrusive
Sedimentary – Clastic, chemical, or biologic rocks
Metamorphic - Foliated and non-foliated

Rocks are also grouped based on their properties like size, shape, texture, chemical composition, permeability, mineralogy, etc.

Based on properties rocks are sub-grouped as:

Igneous rocks – coarse or fine-grained; glassy or obsidian; felsic or mafic.
Sedimentary rocks - conglomerate, sandstone, breccia, shale, siltstone, chalk, crystalline or fossiliferous limestone, gypsum, rock salt etc.
Metamorphic rocks - Gneiss, hornfels, mylonites, cataclasties, marble, etc.

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How would you create an ion with a -1 charge comparing number of electrons and protons

alekssr [168]

In a neutral ion, the number of protons would be equal to the number of electrons. You get a positive or negative charge when electrons are lost or gained.
Example: 12/6 C1-
There are 6 protons, 6 neutrons, and 7 electrons.

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3 years ago

When the number of electrons in an atom changes, then the atom's_______ change.

AlekseyPX

Answer:

It would change the charge of the atom.

Explanation:

Added electrons cause atoms to be negatively charged, lost electrons cause atoms to be positively charged.

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3 years ago

1. In an equilibrium experiment, acetic acid (which is a weak acid) is mixed with sodium acetate (a soluble salt), with methyl o

koban [17]

Explanation:

It is known that acetic acid is a weak acid. It's equilibrium of dissociation will be represented as follows.

$CH_{3}COOH(aq) + H_{2}O(l) \rightleftharpoons CH_{3}COO^{-}(aq) + H_{3}O^{+}(aq)$

On the other hand, sodium acetate ( $CH_{3}COONa$ ) is a salt of weak acid, that is, $CH_{3}COOH$ and strong base, that is, NaOH. Therefore, aqueous solution of sodium acetate will be basic in nature.

Since, acetic acid is a weak acid but still it is an acid. So, when methyl orange is added in a solution of acetic acid then it given a reddish-orange color because of its acidity.

When sodium acetate is mixed into this solution then it will dissociate as follows.

$CH_{3}COO^{-}Na^{+}(aq) \rightleftharpoons CH_{3}COO^{-}(aq) + Na^{+}(aq)$

As both solutions are liberating acetate ion upon dissociation. Hence, it is the common ion.

So, when more acetate ions will increase from dissociation of sodium acetate the according to Le Chatelier's principle the equilibrium will shift on left side.

As a result, there will be decrease in the concentration of hydronium ions. As a result, there will be increase in the pH of the system.

Hence, color of methyl orange will change from reddish orange to yellow. This shift in equilibrium is due to the common ion which is $CH_{3}COO^{-}$ ion.

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3 years ago

If the seawater carbonate ion (CO3 2-) concentration is 270 µmol/kg, a) what is the approximate rate of calcification, and b) ap

STALIN [3.7K]

Explanation:

Below are attachments containing the graph and solution.

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3 years ago

Which of the following lists characteristics of a lake and NOT a reservoir A. Artificial dam, fresh water B. natural dam, filled

tester [92]

<span>Which of the following lists characteristics of a lake and NOT a reservoir A. Artificial dam, fresh water B. natural dam, filled by runoff C. earth dam, salt water D. filled by erosion, cement dam
Answer is B: natural dam,filled by runoff</span>

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3 years ago

Read 2 more answers