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3 years ago

Fill in the blank:

Chemistry

2 answers:

Roman55 [17]3 years ago

7 0

Answer:

Weathering, Erosion

Explanation:

Plants and animals can be agents of mechanical weathering. The seed of a tree may sprout in soil that has collected in a cracked rock. As the roots grow, they widen the cracks, eventually breaking the rock into pieces. Over time, trees can break apart even large rocks.

Tree root systems have a handful of large roots that branch out into a network of smaller roots that often extend out far beyond their branches do. These root systems prevent erosion by holding the soil in place and improving drainage which helps water get absorbed into the soil instead of just running over the top.

Hope this helps

All the love, Ya boi Fraser :)

kotykmax [81]3 years ago

4 0

Weathering and erosion

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3 years ago

When solid ammonium chloride dissociates at a certain temperature in a 0.500 dm3 container, ammonia and hydrogen chloride are fo

SIZIF [17.4K]

1) Reaction

NH4Cl(s) ---> NH3(g) + HCl(g)

2) equilibrium equation, Kc

Kc = [NH3] * [HCl]

3) Table of equilibrium formation

step concentrations
 
 NH4Cl(s) NH3(g) HCl(g)

start 1.000 mole 0 0

react - x

produce +x + x
 ------------------ ---------- -----------

end 1 - x +x +x


1 - x = 0.3 => x = 1 - 0.3 = 0.7

[NH3] = [HCl] = 0.7/0.5 liter = 1.4 (I used 0.500 dm^3 = 0.5 liter)

4) Equilibrium equation:

Kc = [NH3] [HCl] = (1.4)^2 = 1.96

Which is the number that you were looking for.

Answer: Kc = 1.96

8 0

4 years ago

how many H+ ions are in a solution with a pH of 2 and how many H+ ions are in a solution with a pH of 6?

LiRa [457]

Answer:

i) pH = 2

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:- (H+) = 10^(-2)

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ii) pH = 6

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Explanation:

By definition: pH = -log(H+).

Given your pH, solve for the H+ using the the following log rule:

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Also remember unit of concentration is molar (M)

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3 years ago

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Dahasolnce [82]

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3 years ago

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Bumek [7]

Explanation:

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3 years ago