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I need to know Molar mass of butane and all i know is partial pressure of dry butane=720.546 barometric pressure is 741.426? 2) ai+bj+k is perpendicular to both 3i+2j+5k and 2i-j+k. Find the value of a and b? Why the newton of gold on the moon has a great value than on the Earth ? What are the values of μ and σ in the standard normal distribution? Choctaw word for balance?