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Where we are given two equations that equal the same thing we can substitute one into the other e.g. (1) x² + 3x + 10 = y (2) 4 - 2x = y. Sub (2) into (1) - replace y in (1) for (4 - 2x): x<...

To answer this, you need to try and remove on of the letters from the equation. You could multiply the first equation by 2 so that the number in front of the y's are the same in both equations, with 10x+2...

Paper chromatography separates a mixture of solutions by their various solubilities. The less soluble components have a higher affinity to the stationary phase (the paper strip) while more soluble compone...

To start we need to ask: what causes an infection? The answer is a pathogen, which is a microbe that causes disease. These can be bacteria or viruses. A vaccine contains dead or inactive pathogens that ar...

Atom economy is a percentage value which tells you how efficient the product is in comparison to the amount of reactant used.Equation to learn: atom economy = Ar of useful product/A...