- How many moles of calcium are in 425 g calcium (Ca)?

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Will there be another Einstein ? Solve constant s when vector a=i-sj & b=i+j, the angel between the vectors is 60°? Determine the volume in cubic feet? The measurements of a rectangular pit is 28ft long, 11ft wide, and 9 inches deep? If a person died on the 13,115th day of their life, how old would they have been in terms of years? Obtain the series of expansion of y = sin x - x at (i) x = 0 (ii) x=pie?