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Helium molecule is mono atomic.
1 mole = 6.023 x 1023 atoms of helium
So, 2.5 moles = 2.5 x 6.023 x 1023 atoms of helium or 15.058 x 1023 atoms of helium
Wiki User
∙ 11y ago
Wiki User
∙ 10y ago4 x 2.5=10g
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What is atomic weight of helium?
4.002602 g/mol
What is the mass of one mole atoms?
The mass depends on the element whose atoms are concerned. For eg, 1 mol Helium atoms have mass 4 g 1 mol Neon atoms have mass 20 g.
How many liters is 250 grams is SO3?
convert to mol, (divide by molar mass) then multiply by 22.4
How many moles of molecules are there in 250g of hydrogen nitrate?
Hydrogen nitrate has a mass of 63.01 g/mol. In order to find the number of moles you divide the grams by the molar mass. 250/63.01 = 3.96 mol.
What is the mass of helium?
helium = 4 molar mass
How many moles are present in 205g of helium?
To calculate the number of moles, you need to divide the given mass by the molar mass of helium. The molar mass of helium is approximately 4 g/mol. Therefore, the number of moles in 205g of helium would be 205g / 4g/mol = 51.25 mol.
What has more mass one mole of helium or one mole of lead?
Lead. The molar mass of lead is 207.2 g/mol while helium's is 4.0 g/mol.
What is the mass in grams of 0.819 mol of the element He?
The mass of 0,819 mole of helium is 3,278 131 g.
How much helium is in a balloon that contains 0.54 grams of gas?
0.54 grams 1 mol = mass / Mr = mass / 4 (Helium's atomic weight is 4, it is a monoatomic gas) 1 mol = 0.54 / 4 = 0.00135 # of molecules of helium in the balloon = 0.00135 * 6.02 * 10^23
What is atomic weight of helium?
4.002602 g/mol
How does the density of helium compare with the density of hydrogen?
Helium is denser than hydrogen because as the molecular or atomic mass of a gas increases, density increases as well. Hydrogen has a molecular gas of about 2 g/mol while helium has an atomic mass of about 4 g/mol.
Which has the largest mass A 3 mol of magnesium B 1 mol of sucrose c12h22o11 C 10 mol of helium?
Since magnesium and helium do not form elemental molecules, a mole of these elements is the same as a gram atomic mass, which is 24.305 for magnesium and 4.00260 for helium. The gram molecular mass for sucrose is 342.30. Therefore, the mass of: A. 3 moles of magnesium is 72.915 grams; B 1 mole of sucrose (C12H22O11) is 342.30 grams; and C. 10 moles of helium is 40.0260 grams. The largest of these is obviously the single mole of sucrose.
What is the molar mass of CuSo4 x 5H2O?
Molar mass of CuSO4= 63.5 + 32 +4 x 16=63.5 + 96= 159.5g
What is the mass of one mole atoms?
The mass depends on the element whose atoms are concerned. For eg, 1 mol Helium atoms have mass 4 g 1 mol Neon atoms have mass 20 g.
If an unknow gas diffuses 0.25 times as fast as Helium. What is the molecular mass of the unknown gas?
64g/mol
What is the volume of 10.9 mol of helium at STP?
The volume of 10.9 mol of helium at STP is 50 litres.
Is fluorine lighter than helium?
NO, sure not. Helium (He) mass = 4 g/mol Fluorine gas (F2) mass = 2*19 = 38 g/mol (almost 10 times heavier), although fluorine gas hardly can be held stable: it is so VERY rective, even in air!!
