Bromine is made up of two isotopes Br-79 ( 78.9183 amu) and Br-81 ( 80.9163 amu ) Given bromines atomic weight of 79.904 amu, what is the percentage abundance of each isotope?
1. Bromine is made up of two isotopes Br-79 ( 78.9183 amu) and Br-81 ( 80.9163 amu ) Given bromines atomic weight of 79.904 amu, what is the percentage abundance of each isotope?
The percentage abundance of each isotope is:
51% Br-7949% Br-81[tex]\texttt{ }[/tex]
Further explanationGiven:
Mass of Br-79 = 78.9183
Mass of Br-81 = 80.9163
Atomic Weight of Br = 79.904
Unknown:
Percentage abundance of each isotope = ?
Solution:
Let:
Percentage abundance of Br-79 = x%
Percentage abundance of Br-81 = (100-x)%
[tex]\texttt{Atomic Weight of Br} = x\% (\texttt{Mass of Br-79}) + (100-x)\%\texttt{(Mass of Br-81)}[/tex]
[tex]79.904 = x\% \times 78.9183 + (100-x)\% \times 80.9163[/tex]
[tex]79.904 = x\% \times 78.9183 - x\% \times 80.9163 + 100\% \times 80.9163[/tex]
[tex]79.904 - 80.9163 = x\% ( 78.9183 - 80.9163 )[/tex]
[tex]x\% = -1.0123 \div -1.998[/tex]
[tex]x\% \approx 51 \%[/tex]
[tex]\texttt{ }[/tex]
Conclusion:The percentage abundance of each isotope is:
51% Br-7949% Br-81[tex]\texttt{ }[/tex]
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2. How many atoms of bromine (Br) are in 90g br?
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Problem:
How many atoms of bromine (Br) are in 90g Br?
Note:
The molar mass of Bromine atom is equal to 79.9 g/mol
This means that in every 1 mole of bromine, the mass is equal to 79.9 grams/There are 6.022 × 10²³ # of atoms in every 1 mole of Bromine.
This means that in every 79.9 grams of bromine there are 6.022 × 10²³ # of bromine atomsSolution:
We can compute the problem using the conversion of
79.9 grams / 6.022 × 10²³ # of bromine atoms90g Br × 6.022 × 10²³ # of bromine atoms / 79.9 grams
→ 541.98 × 10²³ # of bromine atoms · grams / 79.9 grams
→ 6.78 × 10²³ # of bromine atoms
Answer:
There are 6.78 × 10²³ # of bromine atoms
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3. atomic number of Br?
Answer:
35
Explanation
Answer:
35 PO
Explanation:
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4. which pair of atoms combined by electrovalent bonding?A. Na atom and another Na atomB. Na atom and a Br atomC. Cl atom and another Cl atomD. Na atom and another Cl atom
Answer:
D. Na atom and another Cl atom
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5. what is the electron configuration of Br with atomic number 35 and atomic mass of 80?
Answer:
[Ar] 4s² 3d¹⁰ 4p⁵Explanation:
that is the eclectronic configuration of Bromine.
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:))
6. 1. What do you call the positively charged subatomic particle?<br />2. The negatively charged subatomic particle is known as<br />3. The subatomic particle that has no charge is called what?<br />4. Which model of the atom describes the atom like the solar system whe<br />moving around nucleus in a specific orbit.<br />5. This model states that the atom is mostly an empty space and it has a<br />6. This model of the atom is base on the quantum theory of light where e<br />cloud around the nucleus.<br />7. What do you call a region in space around the nucleus where an electro<br />found?<br />8. The most probable distribution of electrons in an atom is called what?<br />9. What do you call s, p, d and f?<br />10. A model which describes an atom as tiny indestructible sphere with a<br />onfiguration of the following elements (2 POINTS EACH)<br />Asw
Answer:Ano nga ba?
Explanation:
7. In which pairs of atoms would form a non covalent bond? a.)Na-Cl b.)H-Cl c.)Li-Br d.)Br-Br
Answer:
a.Na-CI dahil matalino ka.
8. using the electronegativity difference, which among these atoms have ionic bonds? a. C-O b.Ca-Br c.C-H d.C-Br
Answer:
c
Explanation:
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9. Circle the element with the largest atomic radius and put a square around the element with the smallest atomic radius:Cu K N Br
Answer:
(Br) it has move electrons than Br which means it will have less attraction
Explanation:
hope it helps
10. why does bromine atom become br-?
Answer:
because the bromide ion is larger than the bromine atom.
Explanation:
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11. Comple tag the table by Determining the atomic number atomic weight / mass the number of protons, number of neutron and number of dections Symbol Br Na O atonic Number 35 12 atomic mass 80 23 q No Paratons 35 41 12 8 No of Nectrons 45 LO DATE: symbol No ot Electrons 35 12 4 6
Answer:
Naatomic number: 11
no. of neutrons: 11
no. of electrons: 11
Mgatomic mass: 24
no of neutrons: 12
Fluorineatomic number: 9
no. of protons: 9
atomic number: 8atomic mass: 16
no. of neutrons: 8
12. Question: In which pair of atoms would form a nonpolar covalent bond?a. Na - Cb. H - Clc. Li - Brd. Br - BrAnswer: D. Br - BrExplanation: If the eletronegativity between two atoms is basically the same... Pa heart PO
Answer:
thanks sa pointsExplanation:
Salamat213. 7. AI(NO)8. Sn(SO)9. CH10. CH OHActivity 3: Atomic WeightsGive the atomic weight / mass of the following atom/element. Utilized the attachedperiodic table of elements.1. Ag2.03. Au4. K5. H6. C7. Na8. CI9. Br10. Al
Activity 3: Atomic Weights
Give the atomic weight / mass of the following atom / element. Utilized the attached.
Periodic Table of Elements1. Silver
2. Oxygen
3. Gold
4. Botassium
5. Hydrogen
6. Carbon
7. Sodium
8. Chlorine
9. Wala sa Periodic Table ang no 9
10. Aluminum
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14. for the following pairs of atoms a. C and Br b. As and Cl c. H and Br d. Ca and O
Answer:
b
Explanation:
Sana makatulong
Pa brienliestAnswer:
C.H and Br
Explanation:
because they are one of pair of diatomic elements in atoms
correct me if im wrong
15. cirle the atom in each pair that has the largest atomic radius a al b 5 c br
Answer:
C and D
Explanation:
paki brainliest po, need lng
16. help me po plsss..salamat po sa sasagot.WHAT I HAVE LEARNED<br />Directions: Draw and label the subatomic particles of a Carbon atom whi<br />Atomic Number of 6 and Atomic Mass of 12 and Bromine with Atomic N<br />and Atomic Mass of 80.
Explanation:
CARBON:
* (Atomic Number) 6 = (Protons) 6
* (Neutrons) 6 + (Protons) 6 = (Atomic mass) 12
* (Electron) 6 = (Protons) 6 if neutral
BROMINE:
* (Atomic number) 35 = (Protons) 35
* (Neutron) 45 + (Protons) 35 = (Atomic mass) 80
* (Electron) 35 = (Protons) 35
I HOPE IT HELPS...
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17. Choose the largest atom in each pair Br and Br or Cl and Ar or K and K+
The size of an atom is base on the atomic radius (the distance of electrons from the nucleus)
Br and Br-
Answer:
Br- (it has more electrons than Br which means, it will have less attraction from protons in the nucleus of bromine making the atomic radius larger compared to Br)
Cl and Ar
Answer:
Ar (argon) = it has more protons than Cl, more attraction of surrounding electrons making it occupy a lesser radius.
K and K+
Answer:
K+ = it has less valence shell which means the farthest electron is much closer to the nucleus occupying lesser size compared to K.
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18. The halogen with the largest atomic radius is: w) Cl x) I y) Br z) At
Answer: Z. At
At (Astatine) is a radioactive element and is the heaviest among the halogens. The atomic number of astatine is 85.
19. 15.BrAtomic number - 35Atomic mass? - 80Proton?electron?nuetron?
Answer:
Proton - 35
Electron - 35
Neutron - 45
Explanation:
Atomic number = Proton = Electron
Neutron = Atomic mass - Atomic number
20. 1. Alfred, Marcelino and Larry went to the school clinic to find out their<br />weights. Alfred's weight is 32.58 kilograms. Marcelino's weight is 33.56<br />kilograms, while Larry's weight is 35.84 kilograms. What is the total weight<br />of the three learners?<br />Answer:<br />2. Princess bought a dress worth P1,966,99. If she gave P2,000.00 to the<br />cashier, how much is her changed?<br />Answer:
Answer:
1.101.98
2.33.01
Step-by-step explanation:
1. 32.58---- alfred weight
+ 33.56----Marcelino weight
35.84----Larry weight
---------------
101.98----total weight
2. 2000.00---princess gave to cashier
- 1966.99----dress worth
-------------------
33.01 ----- princess change
21. 1. From the periodic table, look up the average atomic mass of bromine, Br.2. How much heavier is an atom of Br relative to an atom of carbon?3. Which element in the periodic table has an average atomic mass that is about ten times that of fluorine?
Answer:
sjjwjsjejjejedjdjdjd
Explanation:
need q lng points srry
22. circle the element with the largest atomic radius and put a square around the element with the smallest atomic radius:Cu K Ni Br
Answer:
Largest Atomic Radius → Br
Smallest Atomic Radius → K
23. how much heavier is an atom of Br relative to an atom of carbon?
Actually, nobody is aware of the accuracy's precise level. The accuracy of Avagadro's number, (6.022140780.00000018)1023, is merely +/- 18000000000000000.
We understand that 1 mol of carbon has a mass equal to its atomic mass, which is 12.0 g, and that 1 mol of carbon also contains 6.022 x 1023 carbon atoms. So, 12,210 g of carbon weighs 6,13 x 1023 atoms, which is equal to 12,210 x 6,022x1023/12.
Due to their small size, atoms are challenging to weigh. As a result, the atomic mass is calculated by comparing it to other atoms (comparison atoms). The hydrogen atom is first chosen as the reference atom or standard, followed by the oxygen atom. The mass of an atom can be calculated using a comparison or standard isotope because it is known that each isotope of an element has a different mass. The three isotopes of carbon, 2C, C, and C, make up the atom of carbon. The three isotopes' combined average mass is over 12. The 2C atom, or a C atom with a mass of 12 amu, is thus chosen as the comparison or standard atom.
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24. How many mol are 3.8x10^20 atoms of Br?
Answer:
Ang sagot ay 760br
25. 2.How much heavier is an atom of Br relative to an atom of carbon?
Answer:
•Relative to an atom of carbon.
Mark if it is wrongPabrainliest pls26. For the following pairs of atoms, answer the following:a. C and Brb. Ca and Fc. As and C1d. H and Bre.Ca and O
Answer:
A C and br
Explanation:
sana po tama yung sagot ko po
27. ELECTRONEGATIVITY!ARRANGE THE FOLLOWING ELEMENTS:INCREASING ELECTRONEGATIVITYFFr,AsDECREASING ELECTRONEGATIVITYBa,Al,CINCREASING ELECTRONEGATIVITYBr,l,CuA DECREASING ELECTRONEGATIVITYIr Rb,PATOMIC RADIUS!ARRANGE THE FOLLOWING ELEMENTS:INCREASING ATOMIC RADIUSF Fr,AsDECREASING ATOMIC RADIUSBa,Al,HeINCREASING ATOMIC RADIUSBr,Ne,CuDECREASING ATOMIC RADIUSIr Rb XeATOMIC RADIUS!ARRANGE THE FOLLOWING ELEMENTS:INCREASING ATOMIC RADIUSF Fr,AsDECREASING ATOMIC RADIUSBa,Al,HeINCREASING ATOMIC RADIUSBr,Ne,CuDECREASING ATOMIC RADIUSIr Rb Xe
Answer:
I GOT CHU BRO
INCREASING ELECTRONEGATIVITY: FFr < As
DECREASING ELECTRONEGATIVITY: Ba > C > Al
INCREASING ELECTRONEGATIVITY: C < Br < Cu
DECREASING ELECTRONEGATIVITY: Ir > Rb > P
INCREASING ATOMIC RADIUS: Fr < As < F
DECREASING ATOMIC RADIUS: Ba > Al > He
INCREASING ATOMIC RADIUS: Cu < Br < Ne
DECREASING ATOMIC RADIUS: Xe > Ir > Rb
PA BRAINLIEST HEHE
28. How many moles of Copper are there in 11.75 x 10²³ of Copper atoms? <br /><br />#LetsKeepItProfessional
Answer:
You can view more details on each measurement unit: molecular weight of Copper(I) Oxide or grams The molecular formula for Copper(I) Oxide is Cu2O. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Copper(I) Oxide, or 143.0914 grams.
Explanation:
Diko alam sagot.
29. Second step: Find the atomic mass of each atom: K= 1 atom x atomic mass = 1 ( )=Br = 1 atom x atomic mass = 1 ( ) =The formula mass is=
Answer:
hope it helps
Explanation:
1 atom of K is 39 amu- this is the mass, in grams, of one mole of K.
79.904 u
30. in which pair of atoms would form a NONPOLAR COVALENT BOND? a.) Na-Clb.) H-Clc.) Li-Brd.) Br-Br
Answer: A.
Jesus I still need to write 20 characters But that's the answer
