Muscle cramps may be brought on by many conditions or activities, such as: 1  Exercising, injury, or overuse of muscles. 2  Pregnancy. Cramps may occur because of decreased amounts of minerals, such as calcium and magnesium, especially in the later months of pregnancy.  Exposure to cold temperatures, especially to cold water.
Butane is a colorless gas with a faint petroleum-like odor. For transportation it may be stenched. It is shipped as a liquefied gas under its vapor pressure. Contact with the liquid can cause frostbite.
Assume that butane is an ideal gas and that one mole has a volume of 22.4 L at STP. V 1 /n 1 = V 2 /n 2 0.0896 L/n = 22.4 L/1 mole n = 0.0040 moles 12. Experimental molar mass (g/mole) of butane: 0.23 g/0.0040 moles = 58 g/mole 13. The molecular formula of butane is C 4 H 10.