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The alveoli are highly folded in order to increase the surface area available for gas exchange. The thins walls of the alveoli and the supplying capillaries allow for a short diffusion distance, thus incr...

Nell'ultimo secolo il modo di comunicare è profondamente cambiato. Un tempo l'unico modo per tenersi in contatto era inviare delle lettere dovendo aspettare giorni prima di ricevere una risposta. Ora la t...

Both OCR and AQA structure their mark schemes around five Assessment Objectives (AOs). Some portions of your examination will require showing knowledge of all five, others only a selection. In short, they...

Answer: 84.9% The equation for calculating the atom economy is = (Mr of desired product / total Mr of products) x 100 or = (Mr of desired product / total Mr of reactants) x 100 as the total Mr of the prod...

Answer: 16x/(x - 2)

Start with the numerator of the first fraction, 16x² + 4x³ , take a factor of 4x² out to get 4x²(4 + x). Then look at the denominator...