Ionic compounds have a strong force of attraction between the oppositely charged ions, so a lot of energy is needed in order to break the strong bonding force between those ions.
I will say this is True….?
Answer:
E = 1.8 x 10⁵ J/mol
Explanation:
We are being asked the enery per mol for an emission line corresponding to 649 nm.
The energy of a photon is given by the porduct of Planck's contant times the frequency of the radiation,
E = hν
We also know that the frequency is given by
ν = c/λ
where c is the speed of light (3 x 10 ^8 m/s) and λ is 649 nm given in the problem. Therefore the energy per photon will be given by
E= hc/λ = 6.626 x 10⁻³⁴Js x 3 x 10 ^8 m/s/ 649 x 10 ⁻⁹ m
E = 3.1 x 10 ⁻¹⁹ J/ photon
(Note the wavelength has to be in nanometers (1nm= 10⁻⁹ m) and that the energy we get is the energy per a single photon. Thus we will need to multiply this result by Avogadro's number to answer this question.
E = 3.1 x 10 ⁻¹⁹ J/ photon x 6.022 x 10 ²³photon/mol
E = 1.8 x 10⁵ J/mol
Sugar Heat The sugar is in tiny white debris in a pile. warmth is not seen but is implied through the heat source. The pile of sugar in the pot has a mass of one hundred grams. there may be a stable, light brown mass at the lowest of the pot. It has a mass of 100 grams.
The mass of the sugar is the same in melted form as it is in strong crystal form. there has no longer a chemical response. Sugar did not trade composition. It most effectively melted. Melting point is a physical property, and this is bodily change. metallic Wool Oxygen fireplace The metal wool has a silky look and it is rolled up and has a mass of 6 grams.
The oxygen is not visible however it's far internal of an oxygen tank which has a mass of 1 gram. there's brown mustard color sand in a pile and has a mass of seven grams. The mass of the steel wool turned into blended with the mass of the oxygen tank and that became the same seven grams. there has been a chemical reaction. The metallic wool blended with the oxygen of the tank creates a brand new substance known as iron oxide. Egg heat The egg is vicinity on a flat floor and has its shell on. The egg has a mass of forty-five grams. the heat isn't visible however is implied with the aid of the heat supply of the kitchen. The egg is cooked and it's far cut loose from the shell. It has a mass of 45 grams the cooked egg 40 grams and the shell five grams.
Learn more about The oxygen here:-brainly.com/question/28619578
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<h2>That is a <u>Lithium</u> atom!</h2><h3 /><h3>There are THREE protons in that atom. Lithium's atomic number is THREE. If you want to know what isotope that is, look at the neutrons and electrons.</h3><h3 /><h3><em>Please let me know if I am wrong.</em></h3>