- What is the final concentration of Nacl when 5L of 2M of Nacl are mixed with 2L of 5M HCL?

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I'm doing a chemistry assignment and I need to know how a mold inhibitor works and how it affects the food it is applied to. Thanks!? Can mass be designated as "negative mass" if it is measurably missing? Find the inverse of f(x)= (x-8)/(x+9). With steps please.? What is the the volume of the solid bounded by the surface z = 6 + (x − 4)^2 +5y, the planes x = 2, y = 4, and the coordinate planes? What is the physics of electricity?