Answer:
balanced chemical equation is
2 SiO₂ + 3 C₂ = 2 SiC + 4 CO
The observation that indicates that the kinetic-molecular theory has limited use for describing a certain gas is that gas particles are obeying Newton's laws of motion. The correct answer is B.
The amount of matter in an object is said to be its mass. The SI base unit of mass is kilograms i.e.
.
The mass of the object =
(given)
For converting lbs to kg:

So, 
Hence, the mass of
object in kilograms is
.