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2 years ago

Explain why glacial deposits have been found in Africa?

2 answers:

5 0

Glacial deposits of various ages have been found in Africa and in most other continents. This is because the continents move around the surface of the earth due to plate tectonics, and at some times the continent was situated close to one or other of the poles. Bear in mind, however, that at the time these deposits were made Africa was part of the larger supercontinent of Gondwana - glacial deposits of the same age are found in S. America and in India. There was an earlier glacial event as well, and traces of the so-called snowball earth event in the late Precambrian are found in Namibia. However, there are no glacial deposits in Africa that relate to the current ice-age.

aliya0001 [1]2 years ago

3 0

Glaciers were found in Africa because continents were connected and party covered with snow near the south pole long ago.

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Trick to change word equation to chemical equation

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3 years ago

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3 years ago

1. Explain Hydrogen peroxide, H 2 O 2 properties and decomposition reaction.

Len [333]

Answer:

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Explanation:

3 0

3 years ago

Nickel can be plated from aqueous solution according to the following half reaction. How long would it take (in min) to plate 29

andrey2020 [161]

Answer:

It take 3.5 *10² min

Explanation:

Step 1: Data given

Mass of the nickel = 29.6 grams

4.7A

Step 2: The balanced equation

Ni2+ (aq- +2e- → Ni(s)

Step 3: Calculate time

W = (ItA)/(n*F)

⇒ W = weight of plated metal in grams = 29.6

⇒ I = current in coulombs per second. = 4.7

⇒ t = time in seconds.

⇒ A = atomic weight of the metal in grams per mole. = 58.69

⇒ n = valence of dissolved metal in solution in equivalents per mole. = 2

⇒ F = Faraday's constant in coulombs per equivalent. F = 96,485.309 coulombs/equivalent.

29.6 = (4.7 * t * 58.69)/(2*96485309)

t = 20707 seconds

t =345 minutes = 3.5 * 10² min

It take 3.5 *10² min

7 0

2 years ago