Answer:
The core turns its hydrogen to helium and stops nuclear fusion which causes the outer shells of hydrogen to collapse.
Explanation:
This results in higher temperature and pressure which in turn causes the outer shells to expand and cool as a red giant.
Answer:
its height relative to some reference point, its mass, and the strength of the gravitational field
Explanation:
Gravitational energy is the potential energy associated with gravitational force, such as elevating objects against the Earth’s gravity. The potential energy due to elevated positions is called gravitational potential energy.
The factors that affect an object’s gravitational potential energy are the following; its height relative to some reference point, its mass, and the strength of the gravitational field it is in. For instance, consider a wallet lying on a table, it has less gravitational potential energy than the same wallet lying on top of a taller cupboard, and yet lesser gravitational potential energy than a heavier wallet lying on the same table.
If an object lies at a certain height above the Moon’s surface, it has less gravitational potential energy than the same object lying at the same height above the Earth’s surface because the Moon’s gravitational force is weaker.
The number of moles in 2.154 x 10⁻¹ kg of Al is 7.984.
<h3>What is a Mole?</h3>
- A mole is a unit used to describe the amount of substance that has exactly the same number of elementary particles as there are atoms in 12 grams of Carbon - 12.
- A mole has 6.022 x 10²³ elementary particles (atoms, ions or molecules, etc.). This fixed quantity is known as Avagadro's Number.
The molar mass of Al = 26.98 gmol⁻¹
Given the mass of Al = 2.154 x 10⁻¹ kg = 215.4 g
Number of moles given by
where m = given mass of the compound
M = Molar mass of the compound
The number of moles of Al = = 7.984 moles
Hence, the number of moles of Al is 7.984 moles.
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If it has 2 or more non-metals as well as a metal
Ionic compound is formed by negative and positive ions, these ions form ionic bond