Vanadium has an atomic mass of 50.9415 amu. It has two common isotopes. One isotope has a mass of 50.9440 amu and a relative abundance of 99.75 %.
What is the abundance of the other isotope?
What is the mass of the other isotope?
Answer:
Average atomic mass of the vanadium = 50.9415 amu
Isotope (I) of vanadium' s abundance = 99.75 %= 0.9975
Atomic mass of Isotope (I) of vanadium ,m= 50.9440 amu
Isotope (II) of vanadium' s abundance =(100%- 99.75 %) = 0.25 % = 0.0025
Atomic mass of Isotope (II) of vanadium ,m' = ?
Average atomic mass of vanadium =
m × abundance of isotope(I) + m' × abundance of isotope (II)
50.9415 amu =50.9440 amu× 0.9975 + m' × 0.0025
m'= 49.944 amu
Explanation:
The abundance of the other isotope is 0.25% and the mass of the other isotope is 49.944 amu.
What is the natural abundance of elements?Natural abundance can be described as the abundance of isotopes of a chemical element naturally found on a planet. The relative atomic mass of these isotopes is the atomic weight of the element in the modern periodic table.
The abundance of an isotope can vary from planet to planet but remains relatively constant in time. The natural abundance of an isotope can be affected by the probability of its creation in nucleosynthesis and by the production of a given isotope as a daughter of the natural radioactive isotope.
Given, the average atomic mass of Vanadium = 50.9415 amu
The mass of one isotope = 50.9440 amu, relative abundance =99.75 %.
The relative abundance of the other isotope = 100 - 99.75 = 0.25 %
50.9415 = 50.9440 × 0.9975 + 0.0025 × M
Mass of other isotope = 49.944 amu
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Please help me !!!!
Answer:
1) clouds 2) quick 3) near 4) levels 5)nucleus 6) two 7) eight 8) eighteen 9) pairs 10) properties
Explanation:
hope i helped!
Answer:
1. clouds
2. quick
3. near
4. levels
5. nucleus
6. two
7. eight
8. eighteen
9. pairs
10. properties
I do not know if I got 6-8 correctly but I got the other answersWhat is the coordination number for Potassium Nitrate?
Answer:
The coordination number is 8
Potassium nitrate has an octahedral coordination structure
I can be found in the 4th period on the periodic table.
Vanadium (V)
Zirconium (Zr)
Carbon (C)
Beryllium (Be)
Vanadium (V)
Vanadium is the only one in the 4th period here so
In the Bronsted-Lowry model of acids and bases, an _____ is a hydrogen donor and a _____ is a hydrogen acceptor.
Answer:
According to Bronsted-lowry concept an acid is a hydrogen donnor and a base is a hydrogen acceptor.
Explanation:
If molten sodium chloride is split by electrolysis, which reaction occurs at the anode?
2Cl2 (g) →2Cl− (l) + 2e−
2Cl− (l) →Cl2 (g) + 2e−
2Na (l) →2Na+ (l) + 2e−
2Na+ (l) + 2e−→2Na (l)
Answer: [tex]2Cl^-(l)\rightarrow 2e^-+Cl_2(g)[/tex]
Explanation:
Electrolysis of a subastance is breaking it into its constituents by the action of electrical current.
In the electrolysis of molten sodium chloride, sodium metal is produced at the cathode which is a negative electrode and chlorine gas produces as the anode which is a positive electrode.
[tex]2NaCl(l)\rightarrow 2Na^++2Cl^-[/tex]
At anode : [tex]2Cl^-(l)\rightarrow 2e^-+Cl_2(g)[/tex]
At cathode : [tex]2Na^+(l)+2e^-\rightarrow 2Na(l)[/tex]
2Cl- (l) → Cl2 (g) + 2e-
Nuestra alimentación ha empeorado tanto y la oferta de alimentos no saludables (ultraprocesados ricos en sal, grasas y azúcares) es tan amplia, que debemos hacer un esfuerzo en reaprender y reconocer los alimentos que benefician nuestra salud. ¿Qué alimentos debemos escoger para preparar un plato saludable?
Answer:
Nuestra alimentacion debe estar basada en alimentos ricos en vitaminas, minerales como las frutas verduras, legumbres y semillas.
Explanation:
Los alimentos ultraprocesados son altos en sodio, conservantes, y pobres en vitaminas, es por eso que deben ser evitados ya que algunos hasta se consideran hasta carcinogenos.
No se descarta los compuestos quimicos ultraprocesados ricos en grasa perjudiciales para la salud ya que fomentan la formacion de placa de ateromas.
Rafiq has heard that continued exposure to light for 10 days can change the colour of some blue dyes used to colour cotton clothing. He decides to test this. He takes a piece of clothing dyed with a blue dye which is suspected to lose colour on such exposure. He cuts the cloth into two pieces.
Which experiment is likely to help him conclude if the dye indeed can change colour?
He should expose, for 10 days-
A. Both pieces under 2 identical lamps.
B. One piece under a lamp; keep the other in darkness.
C. One piece for 5 days and one for 10 days under identical lamps
D. One piece folded and one piece spread out under 2 identical lamps.
Rafiq should expose one piece under the lamp for 10 days while keeping the other in the darkness.
What are the elements in this experiment?In this experiment, it is essential to have a control group and an experimental group.
Control group: This is the population that does not receive a "treatment" or in this case the piece of fabric that is not exposed to light. It is essential to have this element because it works as a reference.Experimental group: This is the population that receives a special "treatment" or in this case the piece of fabric that must be exposed to light to test if there is a color change.Which experiment design is the best for Rafiq?Based on the previous ideas, the best for him is to keep one piece of clothing in the darkness (control group), while exposing the other to the light of the lamp (experimental group).
In this way, he can determine if there is a real change of color by comparing both pieces after 10 days.
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What is the atomic number of this element?
Answer:
27
Explanation:
what are the elements of the following compounds: sodium bromide,zinc sulphide,lead oxide,magnesium nitride,potassium oixide
Sodium , bromine zinc magnesium sulphur nitrogen potassium oxygen lead
Write the formula iron 11 bromide
Answer:
FeBr2
Explanation:
this isn't really an explanation but it's helpful so here, iron(II) bromide is an inorganic compound with the chemical formula FeBr₂. The anhydrous compound is a yellow or brownish-colored paramagnetic solid. Several hydrates of FeBr₂ are also known, all being pale colored solids.
How many moles of xenon do 5.66 x 10^23 atoms equal
Answer:
0.94 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{5.66 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{5.66}{6.02} \\ = 0.940199...[/tex]
We have the final answer as
0.94 molesHope this helps you
How many moles of O, will occupy 1.00 L at a temper-
ature of -118°C and a pressure of 49.77 atm?
Moles of O₂ = 3.92
Further explanationGiven
V=1 L
T=-118 °C + 273 = 155 K
P = 49.77 atm
Required
moles of O₂
Solution
the gas equation can be written
[tex]\large {\boxed {\bold {PV = nRT}}}[/tex]
where
P = pressure, atm
V = volume, liter
n = number of moles
R = gas constant = 0.08206 L.atm / mol K
T = temperature, Kelvin
Input the value :
n= PV/RT
[tex]\tt n=\dfrac{49.77~atm\times 1~L}{0.082\times 155}=3.92~moles[/tex]
What is it called when elements combine to form a chemical compound?
Explanation:
A compound is a unique substance that forms when two or more elements combine chemically.Compounds form as a result of chemical reactions. The elements in compounds are held together by chemical bonds. A chemical bond is a force of attraction between atoms or ions that share or transfer valence electrons.hope it helpful ✌️✌️
which atmospheric gas is used by plants and given off by animals
20. Sudan III is used to test for
A. cellulose.
B. fats and oils.
C. glucose.
D. protein.
E. starch.
Answer:
Lipid tests
Sudan III is a red fat-soluble dye that is utilized in the identification of the presence of lipids, triglycerides and lipoproteins. The Reaction: Sudan III reacts with the lipids or triglycerides to stain red in colour.
Answer:
I think soo fats and oils
What are the states of matter in precipitation?
Thank you! Have a nice day!
There can be two, solid (Hail) and liquid (Water).
Answer:
liquid and solid
liquid- rain
solid- hail and snow
I don't know about gas; probably not.
What type of chemical bonding would exist between H-C-H?
Answer:
covalent bond
Explanation:
Could you use filtration on a solution?
Answer:
No.
Explanation:
This is because a solution is a mixture with two substances that have already dissolved in each other and so there is no residue left. Filtration works such that part of the mixture has smaller particles that can pass through the membrane of the filter paper while the bigger particles get stuck onto the paper as residue. A solution has a uniform size particle throughout and thus filtration does not work for purifying a solution.
Hydrogen gas is trapped by water displacem ent in a test tube at 25 o C and left to sit until vapor -liquid equilibrium is reached. The total pressure of the trapped gas in th e test tube is 102.0 kPa. What pressure is exerted by the hydrogen gas that was trapped over water?
Answer:
Therefore, the pressure exerted by the hydrogen gas that was trapped over water is 108.8 kPa
Explanation:
The law of partial pressure by Dalton, in a mixture of gases which do not react chemically together, the total pressure is equal to the sum of the partial pressures of the individual gases.
According to this law, the total pressure exerted by the gases above the displaced water is equal to the sum of the partial pressure of water vapor and the partial pressure of hydrogen gas: Ptotal = pH₂ + pH₂O
Therefore, pH₂ = Ptotal - pH₂O
Vapor pressure of water at 37°C = 3.17 kPa; Ptotal = 102.0 kPa
pH₂ = (102.0 - 3.17) kPa
pH₂ = 98.8 kPa
Therefore, the pressure exerted by the hydrogen gas that was trapped over water is 108.8 kPa
Worth 50 points. Please answer correctly
Answer:
question 2 is false
Explanation:
6 is D
What is the minimum number of kiloJoules needed to change 40.0 grams of water at 100C to steam at the same temperature and pressure
Answer:
90.4Kg
Explanation:
The energy required= latent heat of vaporization
Latent heat of vaporization of water= 2260 KJ/Kg
Mass of water = 0.04 Kg
Heat required= 0.04Kg× 2260 KJ/Kg
Heat required= 90.4Kg
Answer: The minimum number of kilo Joules needed is 90.4KJ.
Explanation:
The energy required= latent heat of vaporization.
Latent heat of vaporization of water= 2260 KJ/Kg
Mass of water = 0.04 Kg
Heat required= 0.04Kg× 2260 KJ/Kg
Heat required= 90.4KJ.
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Which element in Group 18 of the Periodic Table has the highest lonization energy?
all the elements in group 18 are Nobel gases or inert gases . all the elements such as neon , helium, argon etc. ,their outermost shell is completely filled . The noble gases have the largest ionization energies, reflecting their chemical inertness
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1/4th of a sample of thorium-232 remains.
How long has the sample been decaying?
Answer:
Explain:i need this too ;-;
Please help does anyone know the answer? I will mark brainliest
Answer:
A. It forced the German government to pay out money it didn't have
Explanation:
Answer:
A. It forced the Germen government to pay out money it didn't have.
What chemical process occurs in cells to release energy?
A.
Oxidation
B.
Respiration
C.
Pespiration
D.
Nutrition
Answer:
B. Respiration
Explanation:
cellular respiration is the process where cells use glucose (C6H12O6) and oxygen gas (O2) to make carbon dioxide (CO2) water (H2O) and ATP, which is energy
formula:
C6H12O6 + 6O2 -> 6CO2 + 6H20 + 38ATP
Complete the chemical name of the compound Col3. Use the periodic table to help form your answer.
Type the correct answer in the box. Spell all words correctly. Use parentheses where appropriate.
Answer:
Cobalt (III)
Explanation:
Since there is a 3 by iodine and cobalt is a transition metal it means cobalt has a 3 charge and we have to write it in roman numerals
Answer:
cobalt(III)
Explanation:
Do not capitalize
What is the molecular formula of the molecule that has an empirical formula of CH2O and a molar mass of 120.12 g/mol
Answer:
C4H8O4
Explanation:
Let (CH20)x
C=1*12.01=12.01 (12.01, 1.01, 16.00 Avg mass of elements)
H=2*1.01=2.01
O=1*16.00=16.00
12.01 + 2.01 + 16.00 = 30.03
120.12/30,03=4
==> (CH2O)4 = C4H8O4
The molecular formula of the molecule that has an empirical formula of [tex]CH_2O[/tex] is equal to [tex]C_4H_8O_4[/tex].
Given the following data:
Empirical formula = [tex]CH_2O[/tex]Molar mass = 120.12 g/mol.Scientific data:
Molar mass of oxygen = 16 g/mol.Molar mass of hydrogen = 1 g/mol.Molar mass of carbon = 12 g/mol.To determine the molecular formula of the molecule that has an empirical formula of [tex]CH_2O[/tex]:
First of all, we would find the molar mass of [tex]CH_2O[/tex]:
[tex]CH_2O =12 +(1\times2)+16\\\\CH_2O =30\;g/mol[/tex]
For molecular formula:
[tex](CH_2O)n = 120.12\\\\30n = 120.12\\\\n=\frac{120.12}{30}[/tex]
n = 4.0
[tex](CH_2O)_4 = C_4H_8O_4[/tex]
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and yes iknow this is not chem don't come at me u_u
Which periodic table trend is represented by the blue arrows?
Answer:
Periodic trends are specific patterns that are present in the periodic table that illustrate different aspects of a certain element, including its size and its electronic properties. Major periodic trends include: electronegativity, ionization energy, electron affinity, atomic radius, melting point, and metallic character. Periodic trends, arising from the arrangement of the periodic table, provide chemists with an invaluable tool to quickly predict an element's properties. These trends exist because of the similar atomic structure of the elements within their respective group families or periods, and because of the periodic nature of the elements.