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Concentration of HCl, Mass of marble chips (use excess HCl).

Enzymes are functional proteins which are used to catalyse reactions. They all exhibit primary, secondary and tertiary structure, and some which have more than one polypeptide chain have quaternary struct...

Expansion of the given expression will result in x to the 3rd power, as there are 3 parts involving x, multiplied together. Let's ignore -5x for a second, and multiply the two expressions in brackets (usi...

As both equations are equal to y, we can combine them to create a single equation in terms of x: x^3 - x^2 -5X + 7 = x + 7. Shift the equation so the left hand side is equal to 0 on the right: x^3 - x^2 -...

The role of the nervous system is to collect, process and respond to information in the environment and to coordinate the workings of organs and cells in the body. It is subdivided into t...