How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

Ans: 1.4 moles

Given:

Mass of tungsten = 250 g

To determine:

Moles of Tungsten

Explanation:

# moles of a given substance = Mass of the substance in grams/molar mass (g.mol-1)

Atomic mass of W = 184 g.mol-1

# moles of W = 250 g/184 g.mol-1 = 1.359 moles

the answer for sodium is 0.186

the answer for rubidium is 0.251

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