- Is only Cr(VI) in potassium dichromate?

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Given f(x)=x+2k/3x-2, find the value of k if f^-1(1)=3
Help meee? If a and b are positive integers such that gcd(a,b)=210, lcm[a,b]=210^3, and a** **A 2.012 g sample of a compound of nitrogen and oxygen has 0.522g of nitrogen. Calculate its empirical formula.? I have 36 purple stones. Under florescent lights stones turned violet/bluish on a 1921 Liberty $20 gold piece, what r they? Found in the bladder lining peculiar cell that slide over one another?