Answer:
because it melting point is low
According to the periodic table, carbon's molar mass is 12.011 grams per mole (that's the small number under the element). So, just multiply like this to get the answer:

So, there are approximately 0.208 grams in 2.5 moles of carbon.
It was called the “spice of madness” because it had an hallucinogenic property.
CBr4 is a symmetric tetrahedral molecule so it will be non-polar.