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You think probable to praseodymium (141Pr).
Isotopes of other elements have also the same mass number.
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∙ 10y ago
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How many neutrons does a cesium 141 have?
The atomic number of cesium is 55. The number of neutrons is the isotope mass number minus atomic number, or in this instance 86 neutrons.
How do you calculate the atomic weight of fluorine if the mass of 8.46.10 to the 24 atoms of fluorine is 266.889?
Atomic weight of fluorine = 6,022 141 78.1023 (Avogadro number) . 266,889 (the mass of atoms)/8,46.1024 (the number of atoms). The IUPAC 2005 atomic weight of fluorine is 18,998 403 2(5).
What do the molar masses of any two elements contain the same number of what?
Atoms have atomic weight not molar mass. Any atom-gram has 6,022 141 29(27)×1023 (this is the number of Avogadro) atoms.
How much mass would two atoms of silver have?
Atomic weight of silver: 107,868 2 u Avogadro's number: 6,022 141 79.1023 1 atom-gram of silver = 6,022 141 79.1023 silver atoms weight of 1 silver atom = 107,8682/6,022 141 79.1023 = 17,9119.1023 grams
How many molecules are there in 9.34 grams of water?
Assuming the question refers to LiCl (Lithium chloride) which has a molecular weight 42.39. Avogadro's constant states there are 6.022 141 79x1023 molecules per mole 9.34 g LiCl is 9.34/42.39 mole (0.220 mole) LiCl The number of molecules is therefore 6.022 141 79x1023x 0.220 =1.326x1023 molecules
How many neutrons does a cesium 141 have?
The atomic number of cesium is 55. The number of neutrons is the isotope mass number minus atomic number, or in this instance 86 neutrons.
What is the mass of a single molecule of water?
- calculate the molecular mass of the substance from the atomic weights of the contained elements - 1 molecule gram of any substance contain 6,023 141 79.1023 molecules (Avogadro number) - mass of a single molecule is: Molecular mass in grams/Avogadro number
How do you calculate the atomic weight of fluorine if the mass of 8.46.10 to the 24 atoms of fluorine is 266.889?
Atomic weight of fluorine = 6,022 141 78.1023 (Avogadro number) . 266,889 (the mass of atoms)/8,46.1024 (the number of atoms). The IUPAC 2005 atomic weight of fluorine is 18,998 403 2(5).
How many neutrons down lanthanum-141 have in its nucleus?
Lanthanum's atomic number is 57 thus it has 57 protons, the number of protons an atom has is equal to the atomic weight, in this case 141 minus the number of protons or 57 so, 141-57=84 Lanthanum-141 has 84 neutrons.
How much is 1 molecule of uranium atoms?
Each isotope of an element has a different number of neutrons. Number of neutrons = Atomic mass of an isotope - atomic number of the element For uranium the atomic number is 92; for the isotopes see the list of isotopes with their atomic mass.
What do the molar masses of any two elements contain the same number of what?
Atoms have atomic weight not molar mass. Any atom-gram has 6,022 141 29(27)×1023 (this is the number of Avogadro) atoms.
What is the difference of atomic mass and molar mass?
A mole is the amount of a substance that contains as many atoms, molecules, ions, or other elementary units as the number of atoms in 0.012 kilogram of carbon 12. The number is 6.0225 × 1023, or Avogadro's number. Molar mass is the mass of one mole of a substance.
How many atoms of oxygen are there in18g of water show calculations?
Chemical formula of water: H2O Atomic weight of oxygen: 15,9994 Atomic weight of hydrogen: 1,oo794 Molecular mass of water: 18,01528 Number of atoms in 15,9994 g oxygen = number of Avogadro = 6,022 141 79.1023
The number of moles in 25 grams of NaCl?
For this you need the atomic (molecular) mass of NaCl. Take the number of grams and divide it by the atomic mass. Multiply by one mole for units to cancel. NaCl=58 grams 25.0 grams NaCl / (58 grams) = .431* moles NaCl *approximation
How do you find the mass of a single molecule?
To find the mass of an atom you divide the constant known as Avagadro's number 6.022X10^23 by the amu of an element. So lets take oxygen for example. The amu of Oxygen is " 15.99" , so you would divide 15.99 by 6.022X10^23. By doing this you will get the mass of one Oxygen atom.
What is your mass in kilograms if you weigh 141 pounds?
1 pound =.4536 Kg 141 pound=(141)(.4536) Kg =63.9576 Kg so ypur mass is 63.9576 Kg.
If the mass of an object is 141 kilograms what is its weight in pounds?
141 kilograms = 310.9 (310.85179) pounds.
