Chemistry High School


Element X has two isotopes. One has a mass of 45.0 amu and is 45.0% abundant. The other has a mass of 47.0 amu and is 55.0% abundant. What is the average atomic mass of element X?*
0 46.1 amu
O 36.5 amu
0 43.8 amu
0 48.9 amu

Answers

Answer 1

The average atomic mass of element X that has two isotopes (one of 45.0 amu mass and 45% abundance and the other of 47.0 amu mass and 55.0% abundance) is 46.1 amu (option 1).  

The average atomic mass (A) of element X can be calculated as follows:

[tex] A = m_{1}\%_{1} + m_{1}\%_{1} [/tex]    (1)

Where:

m₁: is the mass of isotope 1 = 45.0 amu

m₂: is the mass of isotope 2 = 47.0 amu

%₁: is the abundance percent of isotope 1 = 45.0 %

%₂: is the abundance percent of isotope 1 = 55.0 %

Hence, the average atomic mass is (eq 1):

[tex] A = m_{1}\%_{1} + m_{1}\%_{1} = 45.0 amu*45.0\% + 47.0 amu*55.0\% = 45.0 amu*0.45 + 47.0 amu*0.55 = 46.1 amu [/tex]  

Therefore, the average atomic mass of element X is 46.1 amu (option 1).

Find more about atomic mass here:

https://brainly.com/question/3187640?referrer=searchResultshttps://brainly.com/question/17338557?referrer=searchResults

I hope it helps you!

Element X Has Two Isotopes. One Has A Mass Of 45.0 Amu And Is 45.0% Abundant. The Other Has A Mass Of

Related Questions

answer please ASAP???? 50 pointtttsss
pls

Answers

Answer:

Whats the question

Explanation:

Answer:

Where is the question?

Explanation:

Anyways hru all? I've been pretty good

The mass lost by the positive electron should equal the mass gained by the negative electrode suggest two reasons why the results were not expected.

Answers

Answer:

The gain in mass by the negative electrode is the same as the loss in mass by the positive electrode. So the copper deposited on the negative electrode must be the same copper ions that are lost from the positive electrode.

Put in order from smallest to largest radii:
1. AI, Na, CI, Ar, Mg
2. S, Te, Po, Se, O
3. Cl, Ca, S, P, Ga, Mg
4. F, CI, Br, I, At

Answers

Answer:

1. Ar, Cl, Al, Mg, Na

2. O, S, Se, Te, Po

Explanation:

Just remember the trends. From left to right, atomic radius decreases because proton increases and pulls electrons closer. From top to bottom, atomic radius increases because there are more electron shells.

under what circumstances can an atom emit a photon

Answers

Answer:

Here

Explanation:

When the atom absorbs energy, it can move to a higher energy state, or excited state. Under what circumstances can an atom emit a photon? A photon is emitted when an atom moves from an excited state to its ground state or to a lower-energy excited state.

Explain how heat gets transferred?

Answers

Heat can travel from one place to another in three ways: Conduction, Convection and Radiation.

Please help serious answers only

Answers

Answer:

Neptune and Saturn although Neptune isn't on there so just Saturn.

hope it'll help ya out!

Other Questions
If your goal is to retire with at least $1 million, how long would it takeand how much would you need to invest each monthif your anticipated rate of return is 10%? At what age could you retire if you started investing at age 25? What is the end of your proof? (What are you proving?) Find the missing side of each triangle. Round your answers to the nearest tenth if necessary.(Please show your work) y-3(2y-7)=76 quick and with steps 10.comLeg, widthand height A line intersects the points(8,-10) and (9, 4).What is the slope of the line insimplest form?m = [?] How can you avoid or manageType 1 and Type 2 diabetes 4What conclusion can be drawn from this excerpt about Roosevelt's intentions?eply2.He wanted to reassure Americans that the US would remain neutral in the war.OB..ot askvar,nableicallyandtheure...He wanted to convince Americans that Germany was a threat to the entire world.He wanted to prepare Americans for the possibility of entering World War II.He wanted to explain why it was important that we enter the alliance against Germany.ODResetNext 3. What is the relationship between the lungs of a human and the chloroplasts of a greenhouse plant in the oxygen cycle? (4 points) The sailboat ________ its tour of the harbor, so it is time to return the passengers to the dock.Select the option that completes the sentence using the correct perfect tense. had completed has completed is having completed will have completed HELP ASAP PLZ PLZ PLZTegan is playing a computer game on her smartphone and the battery is getting low. When she goes to charge her phone, she notices that the cord is broken. What can Tegan do to solve her problem? Plug in the smartphone to charge. Put tape around the broken part of the cord. Ask a trusted adult for help replacing the cord. Use the laptop charger instead. what technology did Louis Joliet use? The element of art called line is the basic framework of an artwork.TrueFalse Anna's car can go 180 miles on 5 gallons of gas. During a drive last weekend. Ann used 8 gallons of gas. How far did she drive? 2. What was the settled population of Texas in 1777? In 1790? As a citizen of the Philippine republic, write a journal about how you see the Philippines in the next twenty (20) years as an Asian country and as a third world country. he difference of 29 and n What were the six methods the NAWSA used to accomplish their goals (just list, does not need to becomplete sentence) what is ernesto saying at the end of the amazon commercial Translate the blue shape to the pink shape... help me quick please