How many moles are there in 7.25 × 1025 molecules of MgSO4?
To calculate the number of moles in a given number of molecules of a compound, you divide the number of molecules by Avogadro's number (6.022 x 10^23).
The formula for magnesium sulfate (MgSO4) shows that one molecule of MgSO4 contains one atom of magnesium, one atom of sulfur, and four atoms of oxygen.
Therefore, the molar mass of MgSO4 can be calculated as follows:
1 x atomic mass of magnesium (24.31 g/mol) + 1 x atomic mass of sulfur (32.07 g/mol) + 4 x atomic mass of oxygen (16.00 g/mol) = 120.37 g/mol
Now, we can use this molar mass to calculate the number of moles in 7.25 x 10^25 molecules of MgSO4:
7.25 x 10^25 molecules of MgSO4 / 6.022 x 10^23 molecules per mole = 120.44 moles
Therefore, there are approximately 120.44 moles in 7.25 x 10^25 molecules of MgSO4.
To find the number of moles, you can use Avogadro's number, which states that 1 mole of any substance contains 6.022 × 10^23 particles (atoms, molecules, etc.).
In this case, you are given the number of molecules of MgSO4 (7.25 × 10^25). To convert this to moles, you need to divide the number of molecules by Avogadro's number.
So, the calculation would be:
Number of moles = Number of molecules / Avogadro's number
Now, let's substitute the given values:
Number of moles = 7.25 × 10^25 molecules / (6.022 × 10^23 molecules/mole)
By performing the calculation, we get:
Number of moles ≈ 120 moles
Therefore, there are approximately 120 moles in 7.25 × 10^25 molecules of MgSO4.
To calculate the number of moles in a given number of molecules, we need to use Avogadro's number, which states that there are 6.022 × 10^23 molecules in 1 mole of a substance.
Given that there are 7.25 × 10^25 molecules of MgSO4, we can calculate the number of moles using the following steps:
1. Divide the number of molecules by Avogadro's number:
7.25 × 10^25 molecules / 6.022 × 10^23 molecules/mol = 120.25 mol
Therefore, there are 120.25 moles in 7.25 × 10^25 molecules of MgSO4.