Which of the following occurs when an electron moves from a higher energy shell too a lower energy shell

Answers

Answer 1

Answer: A photon is emitted. The energy of the photon is equal to the difference in energy of the two levels.

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What is the empirical formula of the compound whose molecular formula is P4O10
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Describe and explain how petrol is separated from the mixture of hydrocarbons in crude oil?
PLEASE HELP HURRY (Physical Science)Use Newton’s Law to explain why a bowling ball will slow down and stop when rolled in a flat surface, like a street.
Elements in the same group on the periodic table have the same number of electrons number of protons number of neutrons number of valence electrons

These two compounds are in the liquid phase at 293 K a. Br₂ and Hg
b. Cl2 and F2
c. NH4^{+} and H₃O^{+}
d. Fe and Co
e. Diamond and graphite

Answers

It should be br and hg

What is the total number of moles of solute in 250 milliliters of a 1.0 M solution of NaCl

Answers

First, the Molarity equation is M = mol/L. However, the problem is looking for the TOTAL NUMBER OF MOLES in which will have you to reposition the said equation: mol = M/L. Observe that you need L not mL, so you need to convert 250 mL to L that will results to .25 L. Then, substitute the value of the units to the formula and you should be able to get 4 moles.

Answer:

0.25

Explanation:

Which step would help a student find the molecular formula of a compound from the empirical formula?

Answers

First, you need to be given the gram formula mass of this molecular or related conditions that can calculate this. Then you need the empirical formula and calculate the gram formula mass of empirical formula. Then use them to get the ratio. Finally you can get the molecular formula.

Final answer:

To find the molecular formula from the empirical formula, first calculate the empirical formula mass. Then, divide the molecular or molar mass by the empirical formula mass to find the number of empirical formula units per molecule. Finally, multiply the subscript of each element in the empirical formula by this number to get the molecular formula.

Explanation:

The process of finding the molecular formula from the empirical formula involves a few steps. First, you need to determine the empirical formula of a compound, which is the simplest positive integer ratio of atoms present in a compound. After you have the empirical formula, you can calculate the empirical formula mass by summing up the average atomic masses of all the atoms in the empirical formula.

Next, compare the compound's molecular or molar mass (which you should know or have been given) to the empirical formula mass. This comparison is done by dividing the molecular or molar mass by the empirical formula mass. This will give you the number of empirical formula units, denoted as n, per molecule of the compound.

The final step is to take the empirical formula and multiply the subscript of each element in it by n. This will give you the molecular formula of the compound.

Learn more about Finding Molecular Formula here:

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What is heat?
(in scientific vocab)

Answers

my guess i dont know exactly but heat is energy

heat absorbed or radiated during a change of phase at a constant temperature and pressure. specific heat. the heat required to raise the temperature of one gram of a substance one degree centigrade. heat of condensation. heat liberated by a unit mass of gas at its boiling point as it condenses into a liquid.

The isotope atoms differ in ?

Answers

An isotope is formed basically when the amount of neutrons are different than the amount of protons in the nucleus. Therefore, we'd get a variation in the atomic mass (number of neutrons and protons). This is what makes isotopes different.

So, the answer would be: Isotope atoms differ in neutrons.

Allicin contains 59.9 g of carbon, 21.7 g of hydrogen, 24.4 g of oxygen, and sulfur. What is the mass percent of sulfur in a 162 g sample of the compound?"

Answers

Answer: The mass percentage of sulfur in the given compound is 34.56 %.

Explanation:

We are given:

Mass of carbon in compound = 59.9 g

Mass of oxygen in compound = 24.4 g

Mass of Hydrogen in compound = 21.7 g

Mass of the compound = 162 g

Mass of sulfur in compound = $162-(59.9+24.4+21.7)=56g$

To calculate the mass percent of an element in a compound, we use the equation:

$\text{Mass percent of sulfur}=\frac{\text{Mass of sulfur in compound}}{\text{Mass of the compound}}* 100$

Putting values in above equation, we get:

$\text{Mass percent of sulfur}=(56g)/(162g)* 100 = 34.56\%$

Hence, the mass percentage of sulfur in the given compound is 34.56 %.

You can get the mass of sulfur on this compound by minus other element mass from total mass. So the mass is 162-59.9-21.7-24.4=56 g. The mass percent is 56/162*100%=34.57 %.

Other Questions

You are using a calorimeter to calculate the specific heat capacity of a metallic ore. The calorimeter contains 0.50 kilograms of water at room temperature (22 °C). We heat the ore in boiling water and then drop the metal into the calorimeter and wait for the water and metal to reach the same temperature. The mass of the ore is 3.5 kilograms. We find that the water has increased in temperature to 24.3 °C. Recall that the specific heat of water is 4.18 J/g–°C. Calculate the specific heat capacity of the ore.

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