how many moles are present in 2.45 x 10²³ molecules CH₄?
0.41molr
To calculate the number of moles present in a given number of molecules, you need to use Avogadro's number. Avogadro's number is approximately equal to 6.022 x 10²³ molecules/mol.
Given that there are 2.45 x 10²³ molecules of CH₄, you can calculate the number of moles as follows:
Number of moles = Number of molecules / Avogadro's number
Number of moles = 2.45 x 10²³ molecules / (6.022 x 10²³ molecules/mol)
Number of moles ≈ 0.406 mol
Therefore, there are approximately 0.406 moles present in 2.45 x 10²³ molecules of CH₄.
To determine the number of moles present in a given number of molecules, you need to use Avogadro's number, which states that 1 mole of any substance contains 6.022 x 10^23 particles (atoms, molecules, etc).
In this case, you're given the number of molecules of CH₄ (2.45 x 10²³ molecules). To find the number of moles, divide the given number of molecules by Avogadro's number:
Number of moles = Number of molecules / Avogadro's number
Since Avogadro's number is 6.022 x 10^23, you can plug in the values:
Number of moles = (2.45 x 10²³ molecules) / (6.022 x 10^23 molecules per mole)
Now, let's solve the calculation:
Number of moles = 2.45 x 10²³ / 6.022 x 10^23
To divide these numbers, you subtract the exponents (10^23 - 10^23 = 0) and divide the coefficients (2.45 / 6.022).
Number of moles = 0.406 moles
Therefore, there are 0.406 moles of CH₄ present in 2.45 x 10²³ molecules.