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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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What is the mass of 0.46 mol of MgCl2

Ronch [10]

Answer:

43.7

Explanation:

mole is equal mass concentration/ moler mass of MgCl²

8 0

3 years ago

Nicotine is a toxic substance present in tobacco leaves. There are two lone pairs in the structure of nicotine. In general, loca

Harlamova29_29 [7]

Answer:

B.Lone pair in pyrrolidine ring is localized and, therefore, is expected to be more reactive.

Explanation:

There are two nitrogen atoms bearing lone pairs of electrons in the structure of nicotine as shown in the image attached.

One nitrogen atom is found in the pyrrolidine ring. The lone pair on this nitrogen atom is localized hence it is more reactive than the lone pair of electrons found on the nitrogen atom in the pyridine ring which is delocalized a shown in the image attached to this answer.

8 0

2 years ago

What is the relation between concentration of reactants and the rate of chemical reaction?

Lynna [10]

Reaction rates can be increased if the concentration of reactants is raised. An increase in concentration produces more collisions. The chances of an effective collision goes up with the increase in concentration. The exact relationship between reaction rate and concentration depends on the reaction "mechanism".

4 0

3 years ago

Callie rode her bike from the tree at point A back to her house to pick up her jacket while Sue road her bike directly from the

Serjik [45]

We can perceive this question as a vector (which has both magnitude and direction). The magnitude is the displacement and the direction is where they are headed.

Explanation:

The displacement (magnitude of the vector) for Callie, which is also equal to the distance, is; 4m + 3m = 7m while that of Sue is 5m. Therefore the displacement for Callie is greater than Sue’s.

Nonetheless the direction in the vector is the same, which is towards point C.

Learn More:

For more on vectors;

brainly.com/question/12006588

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3 0

3 years ago

Read 2 more answers

In the following reaction, how many grams of ammonia (NH3) will react with 27.8 grams of nitric oxide (NO)? 4NH3 + 6NO → 5N2 + 6

Rzqust [24]

4NH₃ + 6NO → 5N₂ + 6H₂O

mol of NO = $\frac{mass of NO}{Molar Mass of NO}$

= $\frac{27.8 g}{30.01 g / mol}$

 = 0.93 mol

Based on the balance equation mole ratio of NH₃ : NO is 4 : 6
= 2 : 3

If mol of NO = 0.93 mol

then mol of NH₃ = $\frac{0.93 mol * 2}{3}$

= 0.62 mol

Mass of ammonia = mol × molar mass

= 0.62 mol × 17.03 g/mol

= 10.54 g

Therefore B is the best answer

3 0

3 years ago

Read 2 more answers