The mass of 5 moles of ice can be determined by calculating the total mass of the individual atoms present in the ice molecules. Ice is composed of water molecules, each consisting of two hydrogen atoms (H) and one oxygen atom (O).

1. Molecular Formula of Water
The molecular formula of water is H2O, indicating that each water molecule contains two hydrogen atoms and one oxygen atom.

2. Atomic Mass of Hydrogen and Oxygen
The atomic mass of hydrogen (H) is 1 amu, and the atomic mass of oxygen (O) is 16 amu. These values represent the average mass of an atom of that element.

3. Calculating the Molecular Mass of Water
To calculate the molecular mass of water (H2O), we need to sum up the atomic masses of all the atoms present in one water molecule:
- Atomic mass of hydrogen (H) = 1 amu
- Atomic mass of oxygen (O) = 16 amu

Molecular mass of water (H2O) = (2 * Atomic mass of hydrogen) + Atomic mass of oxygen
= (2 * 1 amu) + 16 amu
= 18 amu

4. Mass of 1 Mole of Water
The mass of one mole of any substance is equal to its molar mass in grams. Since the molar mass of water is 18 amu, the mass of one mole of water is also 18 grams.

5. Mass of 5 Moles of Water (Ice)
Now, to find the mass of 5 moles of water (ice), we can multiply the mass of one mole of water by 5:
Mass of 5 moles of water (ice) = 5 * Mass of 1 mole of water
= 5 * 18 grams
= 90 grams

Therefore, the mass of 5 moles of ice is 90 grams.

Summary:
- The molecular formula of water is H2O.
- The atomic mass of hydrogen (H) is 1 amu, and the atomic mass of oxygen (O) is 16 amu.
- The molecular mass of water (H2O) is 18 amu.
- The mass of one mole of water (ice) is 18 grams.
- Therefore, the mass of 5 moles of ice is 90 grams.

No. Of moles of ice (H2O) =5 moles