Answer:the mass of 0.250 moles of tungsten is 45.96 grams.
Step-by-step explanation:
To determine the mass of a given number of moles of a substance, you need to know the molar mass of the substance. The molar mass of tungsten (W) is approximately 183.84 grams per mole (g/mol).
Given that you have 0.250 moles of tungsten, you can calculate the mass as follows:
Mass = Number of moles * Molar mass
Mass = 0.250 moles * 183.84 g/mol
Mass = 45.96 grams