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3 years ago

9

A mineral must be_ rather than organic. Organic materials are formed from_ things. Minerals must be made from materi

als that were non-living things.

1 answer:

rosijanka [135]3 years ago

8 0

The second blank is living. I'm not sure what the first one is.

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Which of the following statements is true about the sense of smell? Men and women smell the same number of odors. The amount of

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Answer:

I think it is B

which I think is the correct answer

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3 years ago

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Name two compounds with more exothermic lattice energies than scandium oxide and justify your choice.

N76 [4]

Answer:

1 . $Al_2O_3$

2. $TiO_2$

Explanation:

The more stable the ionic compound, the more is it lattice energy.

The more the charge on the cation and the anion, the greater is the lattice energy.
The less the size of the cation and the anion, the greater is the lattice energy.

Scandium oxide ( $Sc_2O_3$ ) is an oxide in which $Sc^{3+}$ behaves as cation and $O^{2-}$ behaves as anion.

The compounds which has higher lattice energy than scandium oxide are:

1 . $Al_2O_3$

This is because the charge are same on the cation and the anion as in the case of the Scandium oxide but the size of the cation $Al^{3+}$ is smaller than $Sc^{3+}$ . Thus, this corresponds to higher lattice energy.

2. $TiO_2$

This is because the charge on the cation $Ti^{4+}$ is greater than that of $Sc^{3+}$ and also the size of the cation $Ti^{4+}$ is smaller than $Sc^{3+}$ . Thus, this corresponds to higher lattice energy.

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3 years ago

What will you expect from an endothermic reaction

Lera25 [3.4K]

An endothermic reaction is when the energy is absorbed, while an exothermic reaction releases energy.

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3 years ago

If an atom has an atomic mass of 16 and it has 8 neutrons what is it's atomic number

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The atomic number is 8.

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The crack shown in the lithosphere was created by the movement of two or more tectonic plates. What is this crack called

nikitadnepr [17]

Answer:

The lithosphere is made up of pieces of tectonic plates. These plates are constantly changing and move towards the mantle. Non-stop movement of tectonic plates causes stress on the earth's outermost layer i.e,the crust. When these stresses extends it leads to cause cracks called faults.

Explanation:

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3 years ago