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2 years ago

How do chemical characteristics of rocks effect water

Chemistry

1 answer:

gayaneshka [121]2 years ago

7 0

Answer:

Freezing water can break rock without any change in the minerals that form the rock

Explanation:

<h2><u>Hope this helps→←</u></h2>

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19. Which of the following chemical equations represents

Lesechka [4]

Answer:

C₃H₈ (g) + 5O₂(g) → 3CO₂ (g) + 4H₂O (l)

(option D. with the proviso that the subscripts of propane's chemical formula must be corrected)

Explanation:

<em>Propane</em> is the saturated hydrocarbon, alkane, with chemical formula C₃H₈ or CH₃CH₂CH₃.

The complete combustion of the hydrocarbons yield carbon dioxide (CO₂) and water (H₂O).

The chemical equation that represents this combustion is:

C₃H₈ (g) + O₂(g) → CO₂ (g) + H₂O (l) (skeleton equation: unbalanced)

Once you balance it, you get:

C₃H₈ (g) + 5O₂(g) → 3CO₂ (g) + 4H₂O (l)

Left side Right side

C 3 3

H 8 4×2 = 8

O 5×2 = 10 3×2 + 4 = 10

That equation corresponds to the option D. of the list, with the proviso that the subscripts of propane's chemical formula must be corrected

6 0

2 years ago

Somebody help please I'm really confused about the whole question.

zysi [14]

A 10.0g
ok hope this helps

5 0

2 years ago

The quantity of energy released or absorbed as heat during a chemical reaction is called the 28. a. temperature. c. entropy d. f

Tatiana [17]

Answer: enthalpy of reaction.

Explanation:

Temperature of the gas is defined as the degree of hotness or coldness of a body. It is expressed in units like $^0C$ and $K$

Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

Free energy is the amount of energy that can be converted into useful work.

Enthalpy of the reaction is the difference between the energy of products and the energy of reactants. it is either the heat released or absorbed during the reaction. It is either positive or negative.

5 0

3 years ago

A 37.2-g sample of lead (Pb) pellets at 20Â°C is mixed with a 62.7-g sample of lead pellets at the same temperature. What are th

Vesnalui [34]

Answer:

Mass of sample is 99.9 g, density of ample is 11.35 $g/cm^{3}$ and temperature of sample is $20^{0}\textrm{C}$

Explanation:

Mass is an additive property. Therefore mass of combined sample is summation of masses of two pellets.

Mass of combined sample = (37.2+62.7) g = 99.9 g

Density is an intensive property. Therefore density of combined sample of lead will be same as with density of Pb.

Density of combined sample = 11.35 $g/cm^{3}$

Temperature is an intensive property. Therefore temperature of combined sample of lead will be same as with individual pellets.

temperature of combined sample = $20^{0}\textrm{C}$

8 0

2 years ago

A passenger walks toward the rear of a moving train. Describe her motion as seen from a reference point on the train. Then descr

alex41 [277]

If the train is moving from Point A to Point B, and this motion we arbitrarily deem "forward", then from the reference point of the train, she will be moving backward. From an external reference point, she will be moving in the same direction as the train, but with a lessened velocity.

8 0

3 years ago