Final answer:
The number of molecules in 8.050 * 10^3 grams of water can be calculated by converting grams to moles using the molar mass of water and then multiplying by Avogadro's number.
Step-by-step explanation:
The number of molecules in 8.050 * 10^3 grams of water can be calculated using Avogadro's number and the molar mass of water. The molar mass of water is 18.015 g/mol. To convert grams of water to moles, we can use the conversion factor 1 mol/18.015 g. By multiplying the given mass of water by this conversion factor, we can find the number of moles of water. And since 1 mole of any substance contains 6.022 * 10^23 molecules (Avogadro's number), we can then multiply the number of moles by Avogadro's number to determine the number of molecules in 8.050 * 10^3 grams of water.