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4 years ago

How a river rock layer overtime

Chemistry

1 answer:

IRINA_888 [86]4 years ago

8 0

Answer:

Most of the rocks exposed at the surface of Earth are sedimentary--formed from particles of older rocks that have been broken apart by water or wind. The gravel, sand, and mud settle to the bottom in rivers, lakes, and oceans. These sedimentary particles may bury living and dead animals and plants on the lake or sea bottom. With the passage of time and the accumulation of more particles, and often with chemical changes, the sediments at the bottom of the pile become rock. Gravel becomes a rock called conglomerate, sand becomes sandstone, mud becomes mudstone or shale, and the animal skeletons and plant pieces can become fossils.

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C. Balance these fossil-fuel combustion reactions. (1 point)

storchak [24]

The question is incomplete. The complete question is :

C. Balance these fossil-fuel combustion reactions. (1 point)

C8H18(g) + 12.5O2(g) → ____CO2(g) + 9H2O(g) + heat

CH4(g) + ____O2(g) → ____CO2(g) + ____H2O(g) + heat

C3H8(g) + ____O2(g) → ____CO2(g) + ____H2O(g) + heat

C6H6(g) + ____O2(g) → ____CO2(g) + ____H2O(g) + heat

Solution :

C8H18(g) + 12.5O2(g) → __8__CO2(g) + 9H2O(g) + heat

When 1 part of octane reacts with 12.5 parts of oxygen, it gives 8 parts of carbon dioxide and 9 parts of water along with liberation of energy.

CH4(g) + __2__O2(g) → __1__CO2(g) + __2__H2O(g) + heat

When 1 part of methane reacts with 2 parts of oxygen, it gives 1 part of carbon dioxide and 2 parts of water along with liberation of energy.

C3H8(g) + __5__O2(g) → __3__CO2(g) + __4__H2O(g) + heat

When 1 part of propane reacts with 5 parts of oxygen, it gives 3 part of carbon dioxide and 4 parts of water along with liberation of energy.

C6H6(g) + __1/2__O2(g) → __6__CO2(g) + __3__H2O(g) + heat

When 1 part of propane reacts with 1/2 parts of oxygen, it gives 6 part of carbon dioxide and 3 parts of water along with liberation of energy.

5 0

3 years ago

2.5 moles of gas occupies 50 L, how many moles of the gas would occupy 100L?

goldenfox [79]

Answer:

Explanation:

2.5M=50L

X =100L

2.5MX100L

________ =250M/L

5OL 50L

=5 Moles

6 0

3 years ago

In which of the following substances do you find strong hydrogen bonding?

makvit [3.9K]

Answer:

The strength of an individual H bond depends on the polarity of the H-X bond and therefore on the electronegativity of X ( the more delta positive the H atom, the stronger the electrostatic force of attraction between it and a lone pair of electrons). Thus, on a per bond basis, HF H bonding is strongest. However, as water has two H atoms, each molecule can form two H bonds so on a per molecule basis, water H bonding is strongest (this is evidenced by the boiling points of the three substances; NH3 < HF < H2O.)

Explanation:

Correct me if I'm wrong

7 0

3 years ago

Given a balanced chemical equation it is always possible to determine

Alborosie

Answer:

C) the relative number of moles taking part in the reaction

Explanation:

From a balanced chemical equation, it is always possible to determine the relative number of moles taking part in a chemical reaction.

The number of moles is the amount of the reacting specie that makes up a chemical reaction.

In balanced chemical equation, the number of moles of reactants and products must be the same.
From this understanding, we can determine the amount of reactants and products needed for a chemical reaction to take place.

8 0

3 years ago

9.How many valence electrons would an atom of Chlorine have? a.2 b.3 c.7 d.8

agasfer [191]

The answer is C there is 7

7 0

3 years ago