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Multiply matrices A and B of any sizes legally (no size compatibility requirment). What kind of matrix multiplication am I? What is the partial pressure of N2 in a mixture of N2 and O2 having a total pressure of 1075 torr if the partial pressure of O2 is 720 torr? Naphthalene sublimation rate=3*10^-5/min. Volume of room=60m^3. How would I calculate the naphthalene concentration in the air of the room? How much butter is equal to 2 tablespoons of oil? I'm trying to find a compound that contains an alkaline earth metal and a polytomic ion and then finding its molar mass.?