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Multiply 0.58 by Avogadro's number, which is 6.02 x 10^23.
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What is the symbol for selenium atoms gain two electrons?
The symbol is Se(2-).
Which pair of atoms will have the same valence-shell electron configuration Se and Te Sr and Cs N and O H and He?
Se and Te
Which element Mo Se Na or Br contains the most moles of atoms in a 1.0 gram sample?
This element is sodium.
What is the Lewis dot structure for Al2S3?
The chemical formula for aluminum selenide is Al2Se3. This is an ionic compound, so it is shown with 2 Al 2+ + 3 [Se] 2-. Around the Se are dot pairs on all four sides showing the complete transfer of electrons from the Al to the Se atoms.
How would you rank these atoms from smallest to largest atomic radius Cs K O Se?
The order is: O (60 pm), Se (115 pm), K (220 pm), Cs (260 pm); these are covalent radii after Slater.
How many atoms are there in 80.7 g of selenium?
Atomic mass Se = 78.96. So, atoms Se in 80.7g would be 80.7 g x 1mol/78.96g x 6.02x10^23atoms/mol = 6.15x10^23 atoms
Determine the mass in grams of 5.56x1024 atoms of selenium?
6.023 x 1023 atoms of selenium will weigh 78.96 g So, 5.56 x 1024 atoms of selenium will weigh 728.9 g
The mass in grams of 1.9 mol selenium?
1.9 mol Se ( 78.96 grams/1mol Se ) = 150.024 grams
What 'SE' tells us how many atoms of each kind are there in a reaction?
The answer about SE is: symbol equation
A sample of Se weighs 20.5 grams will a sample of V that contains the same number of atoms weigh more or less than 20.5 grams?
A sample of Se weighs 20.5 grams. Will a sample of V that contains the same number of atoms weigh more or less than 20.5 grams? (more, less): _______Calculate the mass of a sample of V that contains the same number of atoms. _______ grams of VAnswer:Since the atomic weight of V is smaller than the atomic weight of Se, each atom will have a smallermass, and the sample will weigh less.Since the same number of moles will contain the same number of atoms, regardless of the element, it is only necessary to find the number of moles of Se in the 20.5 gram sample, and then to find the mass of the same number of moles of V.The atomic weight of Se is 79.0 g/mol1. Convert grams of Se to moles of Se:moles Se= 20.5 g Se1 mol = 0.260 mol Se79.0 gMultiply by moles per gram. Grams cancel out.The atomic weight of V is 50.9 g/mol2. To convert 0.260 moles of V to grams of V:grams V = 0.260 mol V50.9 g = 13.2 g V1 molMultiply by grams per mole. Moles cancel out.
How many atoms does it to take to have a selenium and oxygen bond?
One atom of Se and one atom of O.
What atoms tend to gain two electrons to form a 2- anion?
se and sometimes gain electrons. Atoms with eight valence electrons do not easily lose electrons
What is the symbol for selenium atoms gain two electrons?
The symbol is Se(2-).
How many atoms are there in 61.7 g of selenium?
1 mol of sulfur contains 6.02 x 1023 molecules (avogadro constant). In one molecule of sulfur, S8, there are 8 sulfur atoms. Thus, number of atooms in 7.20 moles of sulfur = 8 x 7.20 x 6.02 x 1023 = 3.47 x 1025 Note: Sulfur does not usually exist in a monatomic form but instead forms cyclic octatomic molecules with molecular formula S8.
Which pair of atoms will have the same valence-shell electron configuration Se and Te Sr and Cs N and O H and He?
Se and Te
A compound containing selenium and fluorine is decomposed in the laboratory and produces 2.231 of selenium and 3.221 of fluorinCalculate the empirical formula of the compound e?
The answer is SeF6.This is figured by:2.231 grams of Se divided by 78.79 g/mol = 0.0283 moles of Se3.221 grams of F divided by 18.998 g/mol = 0.1695 moles of F0.1695 moles of Se/0.0283 moles of F = 5.9909 ~ 6 moles of Se/mole of FSo SeF6
What atoms tend to gain two electrons to form a anion?
se and sometimes gain electrons. Atoms with eight valence electrons do not easily lose electrons
