- Which is the molarity of a 1250ml solution that contains 75g of NaoH?

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1-5, thank you? If a=4i-j+k and b=2i-2j+k, then find a unit vector parallel to the vector a+b? Calculate the number of molecules/m^3 in an ideal gas at STP.? Find the value of c so that x-5 is a factor of the polynomial p(x).
p(x)=x^3+2x^2+cx+10? Concentration of reactants is reduced over the course of reaction. true or false?