If a diamond is heated without oxygen, it will turn to graphite, a form of that it is used as a lubricant. A. carbon is so soft B. is carbon so soft C. carbon so soft D. so soft th
If a diamond is heated without oxygen, it will turn to graphite, a form of _____ that it is used as a lubricant.
A. carbon is so soft
B. is carbon so soft
C. carbon so soft
D. so soft the carbon