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A helium balloon contains 0.46 g of helium how many moles of helium does it contain?
To find the number of moles of helium in the balloon, you need to divide the mass of helium by its molar mass. The molar mass of helium is approximately 4 g/mol. Therefore, 0.46 g of helium is equal to 0.46 g / 4 g/mol = 0.115 mol of helium in the balloon.
What is atomic weight of helium?
4.002602 g/mol
What is the mass of helium?
helium = 4 molar mass
What is the mass of 0.45 mol of ammonium sulfate?
To calculate the mass of 0.45 mol of ammonium sulfate (NH4)2SO4, you need to know its molar mass. The molar mass of (NH4)2SO4 is 132.14 g/mol. Multiply the number of moles (0.45 mol) by the molar mass to get the mass: 0.45 mol x 132.14 g/mol = 59.46 grams. Therefore, the mass of 0.45 mol of ammonium sulfate is 59.46 grams.
How many moles of molecules are there in 250g of hydrogen nitrate?
To find the number of moles in 250g of hydrogen nitrate (HNO3), we first need to determine the molar mass of HNO3. The molar mass of HNO3 is 63.01 g/mol. Then, we can calculate the number of moles by dividing the given mass by the molar mass: 250g / 63.01 g/mol = approximately 3.97 moles of HNO3 molecules.
What is the mass in grams of 0.819 mol of the element He?
The molar mass of helium (He) is approximately 4.0026 g/mol. To find the mass of 0.819 mol of helium, you would multiply the number of moles by the molar mass: 0.819 mol * 4.0026 g/mol ≈ 3.28 grams of helium.
What is the atomic mass of helium if you know that 2.5 mo of helium has a mass of 10 grams?
Atomic mass = weight in gram / moles = 10 / 2.5 = 4 amu
How many moles of Helium are in 6.46 g of Helium?
Helium is 4g/mol, so 6.46g of helium is 6.46/4=1.62 moles He.
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.
How many moles does g of helium he contain?
To calculate the number of moles of helium in a given mass (g), you can use the formula: [ \text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}} ] The molar mass of helium is approximately 4.00 g/mol. So, if you have a specific mass of helium, divide that value by 4.00 g/mol to find the number of moles.
Which gas is heavier among argon oxygen and helium?
Argon is heavier than oxygen and helium. Argon has an atomic mass of 39.948 g/mol, while oxygen has an atomic mass of 16.00 g/mol and helium has an atomic mass of 4.003 g/mol. Argon is a noble gas that is denser than both oxygen and helium.
A helium balloon contains 0.46 g of helium how many moles of helium does it contain?
To find the number of moles of helium in the balloon, you need to divide the mass of helium by its molar mass. The molar mass of helium is approximately 4 g/mol. Therefore, 0.46 g of helium is equal to 0.46 g / 4 g/mol = 0.115 mol of helium in the balloon.
How many moles are in 30.8g of helium?
4 g of He = 1 mole. So, 30.8 g = 7.7 moles
What is the mass of 43.7 L of helium at STP?
The mass of 43,7 L of helium at STP is 7.8 g.
What is the mass of 18.8 moles of helium atoms?
1 mole of helium weighs 4.0026 g So. 18.8 of helium will weigh 75.25 g
What has more atom 1 kg of helium or 1 kg of iron?
1 kg of helium contains significantly more atoms than 1 kg of iron. This is because helium is much lighter than iron; helium has a molar mass of about 4 g/mol, while iron's molar mass is around 56 g/mol. As a result, there are approximately 250 moles of helium in 1 kg, compared to about 17.9 moles of iron, leading to a greater number of helium atoms overall.
How many moles of heLium are contained in 0.255g of helium?
use this formula, n(He)=m(He)/M(molar mass of He) =0.255G/4.OO =0.06375 moles per gram.
