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coldgirl [10]
3 years ago
12

How does a tree speed up erosion? How can it slow erosion down?

Chemistry
1 answer:
GREYUIT [131]3 years ago
8 0
A tree is able to speed up erosion because it break up rocks. This can happen as it’s roots grow through rocks, the water breaks through rocks, etc.
It can slow erosion down because it can act as a barrier to the elements that erode.
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What is element Na in a periodic table
Bess [88]

Answer:

Sodium.  

Explanation:

Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is ²³Na.

7 0
3 years ago
Read 2 more answers
The pH of a 0.150 molar solution of a weak acid is 4.10. What is the pKa of the acid?
Kamila [148]
Answer: 4.21×10⁻⁸

Explanation:


1) Assume a general equation for the ionization of the weak acid:

Let HA be the weak acid, then the ionization equation is:

HA ⇄ H⁺ + A⁻

2) Then, the expression for the ionization constant is:

Ka = [H⁺][A⁻] / [HA]

There, [H⁺] = [A⁻], and [HA] = 0.150 M (data given)


3) So, you need to determine [H⁺] which you do from the pH.

By definition, pH = - log [H⁺]

And from the data given pH = 4.1


⇒ 4.10 = - log [H⁺] ⇒ [H⁺] = antilog (- 4.10) = 7.94×10⁻⁵

4) Now you have all the values to calculate the expression for Ka:

ka = 7.94×10⁻⁵ × 7.94×10⁻⁵ / 0.150 = 4.21×10⁻⁸
3 0
3 years ago
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What is the noble gas electron configuration of bismuth (Bi)? A. [Kr] 6s2 6p3 B. [Xe] 6s2 6p3 C. [Xe] 4f14 5d10 6s2 6p3 D. [Kr]
OlgaM077 [116]

The answer is C) Xe 4f14 5d10 6s2 6p3

4 0
3 years ago
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What element is chemically combined with hydrogen
Fudgin [204]

Uh I think water is??

5 0
3 years ago
I need help on this one pliz
Artyom0805 [142]
The answer would be 16.04.
8 0
3 years ago
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