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3 years ago

1.

2 answers:

8 0

Igneous rock is formed by cooling magma. Sedimentary rock is formed through the lithification process of cementing, compacting, and hardening of the sediments. Metamorphic rock is formed by metamorphosis of igneous and sedimentary rocks.

FinnZ [79.3K]3 years ago

7 0

Answer:

1- Option (2)

2- Option (3)

3- Option (1)

Explanation:

The rock cycle refers to the cyclic process that leads to the formation of three different types of rocks namely the igneous, sedimentary and the metamorphic rocks, and also their alteration from one rock type to another under certain factors and conditions.

In order to form another type of rocks that are to be deposited in some other environment, the source rock must undergo the process of weathering and erosion. Weathering leads to the breakdown of rocks and erosion leads to the transportation of the broken fragments and sediments. This new sediments after deposition and lithification will give rise to the formation of sedimentary rocks such as Sandstone and Limestone.

The rocks that are formed under extremely high pressure and temperature condition are usually known as metamorphic rocks. These are directly obtained from the previously existed sedimentary or igneous or other metamorphic rocks. So they are also known as secondary rocks. For example, Quartzite, Schist, and Gneiss.

The rocks that are directly derived from the cooling and solidification of magma are known as igneous rocks. When these rocks are crystallized below the earth's surface then they are called intrusive igneous rocks, and when they crystallized on the earth's surface then they are called extrusive igneous rocks. For example, Granite and Basalt.

Thus, the correct answers are mentioned above.

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Annette [7]

Answer:

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Levart [38]

Answer:

Explanation:

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3 years ago

How many grams of product are formed from 2.0 mol of N2 (g) and 8.0 mol of Mg(s)? Show all calculations leading to an answer. Li

Vaselesa [24]

Balanced chemical reaction happening here is:

3Mg(s) + N₂(g) → Mg₃N₂(s)

moles of product formed from each reactant:

2.0 mol of N2 (g) x 1 mol Mg₃N₂ = 2 mol Mg₃N₂

1 mol N2

and

8.0 mol of Mg(s) x 1 mol Mg₃N₂ = 2.67 mol Mg₃N₂

3 mol Mg

Since N2 is giving the least amount of product(Mg₃N₂) ie. 2 mol Mg₃N₂

N2 is the limiting reactant here and Mg is excess reactant.

Hence mole of product formed here is 2 mol Mg₃N₂

molar mass of Mg₃N₂

= 3 Mg + 2 N

= 101g/mol

mass of product(Mg₃N₂) formed

= moles x Molar mass

= 2 x 101

= 202g Mg₃N₂

202g of product are formed from 2.0 mol of N2(g) and 8.0 mol of Mg(s).

The following are indicators of chemical changes:

Change in Temperature

Change in Color

Formation of a Precipitate

8 0

3 years ago

When the following oxidation-reduction occurs, what is the balanced reduction half-reaction after the electrons in both half rea

Lostsunrise [7]

Answer : The balanced reduction half-reaction is:

$3Cu^{2+}+6e^-\rightarrow 3Cu$

Explanation :

Redox reaction or Oxidation-reduction reaction : It is defined as the reaction in which the oxidation and reduction reaction takes place simultaneously.

Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. In this, oxidation state of an element increases. Or we can say that in oxidation, the loss of electrons takes place.

Reduction reaction : It is defined as the reaction in which a substance gains electrons. In this, oxidation state of an element decreases. Or we can say that in reduction, the gain of electrons takes place.

The given balanced redox reaction is :

$Al(s)+Cu^{2+}(aq)\rightarrow Al^{3+}(aq)+Cu(s)$

The half oxidation-reduction reactions are:

Oxidation reaction : $Al\rightarrow Al^{3+}+3e^-$

Reduction reaction : $Cu^{2+}+2e^-\rightarrow Cu$

In order to balance the electrons, we multiply the oxidation reaction by 2 and reduction reaction by 3 and then added both equation, we get the balanced redox reaction.

Oxidation reaction : $2Al\rightarrow 2Al^{3+}+6e^-$