A glass of water contains 1.2 x 1024 molecules of water. An additional 4.0 moles of water are poured into the glass. How many moles of water are in the
glass?
there are 6.0 x 1E23 molecules in a mole
2.0 moles + 4.0 moles
1.2E24 / 6.0E23 = 2.0 moles
4.0 moles are added
To find the total number of moles of water in the glass, we need to sum up the initial moles of water with the additional moles poured in.
1.2 x 10^24 molecules of water can be converted to moles using Avogadro's number, which states that 1 mole of water contains 6.022 x 10^23 molecules.
So, 1.2 x 10^24 molecules of water is equal to (1.2 x 10^24) / (6.022 x 10^23) = 1.99 moles of water (approximately).
Adding the 4.0 moles of additional water poured into the glass, the total number of moles of water in the glass is 1.99 moles + 4.0 moles = 5.99 moles (approximately).
To find the total number of moles of water in the glass, we need to add the initial moles of water to the additional moles poured into the glass.
The initial number of moles of water in the glass can be calculated by dividing the given number of water molecules by Avogadro's number.
Avogadro's number (NA) is approximately 6.022 x 10^23 mol^-1.
First, let's calculate the initial moles of water:
Number of water molecules = 1.2 x 10^24 molecules
Initial moles of water = Number of water molecules / Avogadro's number
Initial moles of water = (1.2 x 10^24 molecules) / (6.022 x 10^23 mol^-1)
Initial moles of water ≈ 1.993 mol
Now, let's calculate the total moles of water in the glass by adding the initial moles to the additional moles poured into the glass:
Total moles of water = Initial moles of water + Additional moles of water
Total moles of water = 1.993 mol + 4.0 mol
Total moles of water ≈ 5.993 mol
Therefore, there are approximately 5.993 moles of water in the glass.