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An acid is a substance which releases hydrogen ions (protons) when added to water. pH values of less than 7 are considered acidic, with 1 indicating it is a strong acid.
Ensure that your answer is precise, without too much waffle - this can confuse examiners and you'll lose easy marks! Take it step by step:First, the neurotransmitter, acety...
To write a top essay in French, you need structure, vocabulary and complex structures. Try to use topic-related vocab for both AS topics and for A2 literature, and try to use complex structures in as many...
This can't be differentiated with the usual methods (chain rule, product rule). First we set y = xx, and our objective is to calculate dy/dx in terms of x.To turn this function into more ...
To calculate an object's weight, we have weight = mass * gravitational field strength (W = mg). From this, we see that an object with a greater mass (e.g. a hammer compared with a feather) has a greater w...
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