Question

What would be the mass of a sample containing 0.700 moles of pure tungsten?

0.040 g

51.8 g

129 g

263 g

Answer 1

We must first find the molar weight of Tungsten, found on the periodic table as 183.84g per mole.

We are told to find the mass of a sample containing 0.700 moles of Tungsten, so we can set this up in a multiplication equation and cancel units to find the mass in grams:


`(183.84g)/(1mol) * (0.700mol)/(1) =128.688g`

So the answer that is closest to this value is C) 129g.