How many butane molecules are present in a sample that contains 5.0 moles of butane? (Butane- C4H10)

What would be the mass of 75 moles of butane?

1 mol of anything (butane for example) contains 6.02 x 10^23 anythings(molecules of butane for example).

1 mol of butane is the molar mass of butane in grams.

2C4H10 (g) + 13O2 (g) → 8CO2 (g) + 10H2O (g)

To determine the number of butane molecules in a given sample, you can use Avogadro's constant (6.022 x 10^23 molecules/mol).

Step 1: Calculate the number of butane molecules in 5.0 moles of butane:

Number of molecules = number of moles x Avogadro's constant
Number of molecules = 5.0 moles x 6.022 x 10^23 molecules/mol
Number of molecules = 3.011 x 10^24 molecules

Therefore, there are 3.011 x 10^24 butane molecules in a sample containing 5.0 moles of butane.

Now, let's calculate the mass of 75 moles of butane:

Step 1: Determine the molar mass of butane (C4H10):
Molar mass of carbon (C) = 12.01 g/mol
Molar mass of hydrogen (H) = 1.01 g/mol
Molar mass of butane (C4H10) = (4 x 12.01 g/mol) + (10 x 1.01 g/mol)
Molar mass of butane = 58.12 g/mol

Step 2: Calculate the mass of 75 moles of butane:

Mass = number of moles x molar mass
Mass = 75 moles x 58.12 g/mol
Mass = 4359 g

Therefore, the mass of 75 moles of butane is 4359 grams.

To determine the number of molecules in a given number of moles, you can use Avogadro's number. Avogadro's number, denoted as 6.022 x 10^23, represents the number of particles (atoms, molecules, or ions) in one mole of a substance.

To find the number of butane molecules in 5.0 moles, you can use the equation:

Number of molecules = number of moles x Avogadro's number

Number of molecules = 5.0 moles x 6.022 x 10^23 molecules/mole

Calculating this equation will give you the answer:

Number of molecules = 3.011 x 10^24 molecules

Therefore, there are approximately 3.011 x 10^24 butane molecules present in 5.0 moles of butane.

Moving on to the second question, to determine the mass of a given number of moles, you will need the molar mass of the substance. The molar mass represents the mass of one mole of the substance in grams.

The molar mass of butane (C4H10) can be calculated by adding up the atomic masses of its individual elements:

Carbon (C) has an atomic mass of 12.01 g/mol
Hydrogen (H) has an atomic mass of 1.01 g/mol

To calculate the molar mass of butane, multiply the atomic masses by the number of atoms present in the molecule:

(4 x 12.01 g/mol) + (10 x 1.01 g/mol) = 58.12 g/mol

So, the molar mass of butane is 58.12 g/mol.

To find the mass of 75 moles of butane, you can use the equation:

Mass = number of moles x molar mass

Mass = 75 moles x 58.12 g/mol

Calculating this equation will give you the answer:

Mass = 4359 g

Therefore, the mass of 75 moles of butane is 4359 grams.