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slavikrds [6]
3 years ago
7

If matter is uniform throughout and cannot be separated into other substances by physical means, it is __________.

Chemistry
2 answers:
lesya [120]3 years ago
6 0
B. either an element or a compound
yulyashka [42]3 years ago
4 0

Answer: Option (a) is the correct answer.

Explanation:

When an element chemically combines with another element in a fixed ratio by mass then it results into the formation of a compound.

A compound can be separated into its constituent particles only by chemical means and not by any physical means.

An element is a substance which contains only one type or kind of atoms.

For example, a piece of sodium will contain only atoms of sodium.

An element cannot be divided into its constituent particles by any means.

Whereas particles of a mixture never combine chemically with each other. So, they can be separated by physical means.

Thus, we can conclude that if matter is uniform throughout and cannot be separated into other substances by physical means, it is a compound.

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Geologists have a rule of thumb: when molten rock cools and solidifies, crystals of compounds with the smallest lattice energies
lutik1710 [3]

Geologists have a rule of thumb: when molten rock cools and solidifies, crystals of compounds with the smallest lattice energies appear at the bottom of the mass because of high power of solubility.

<h3>What is lattice energy? </h3>

The lattice energy is defined as the energy change upon the formation of one mole of crystalline ionic compound from its same constituent ions, that are assumed to be initially in the state of gases. It is also defined as measure of the cohesive forces which bind ionic solids together.

As the lattice energy of the ionic compound increase the solubility of that particular compound decrease. Hence compound which have low lattice energy are more soluble than compound having high lattice energy. When molten rocks cools and solidified, the compound having smallest lattice energy become more soluble than crystals of compound which have large lattice energy. Therefore, crystal of compound with the smallest lattice energy start appearing at the bottom of the mass.

Thus, we concluded that due to high solubility power of compound with low lattice energy appear at the bottom of the mass.

learn more about lattice energy:

brainly.com/question/13169815

#SPJ4

4 0
1 year ago
10. In which of the following is the symbol for the ion and the total number of electrons it contains given correctly?
dalvyx [7]

Answer:

10. D

9. A

8. A or B

Explanation:

10. Calcium has 20 electrons, but the Calcium ion has 18 electrons.

9. The mass of electrons are negligible.

8. Electrons have a very small mass where some consider it to have no mass.

5 0
3 years ago
How is percent by mass and concentration related?
Julli [10]
You can have a solution of hydrogen peroxide that might say 10% that means that 10% per mass of the hydrogen peroxide solution is the hydrogen peroxide the rest is water.

concentration is the amount of mass in the solution eg 5gdm-3

hope that helps
6 0
2 years ago
Which is the molar mass of H2O?
Svetllana [295]
H=(2x1.008)=2.016
O= 15.999

15.999
+ 2.016
______
18.015 g/mol :)

3 0
2 years ago
Read 2 more answers
What was Ernest Rutherford's experiment?
Dafna1 [17]

Answer:

C. He shot tiny alpha particles through a piece of gold foil.

Explanation:

In the year 1911, Ernest Rutherford performed the gold foil experiment which gave a deeper perspective to the structure of an atom.

He simply collided a thin gold foil with an alpha particle which he generated from a radioactive source. He discovered that most of the alpha particles passed through the thin gold foil but a few were deflected back. His discovery led to the proposition of the nuclear model of the atom.

6 0
3 years ago
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