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What is electronegativity?

Simple definition: Electronegativity is the tendency of an atom to attract a bonding air of electrons to itself
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Answered by Adam R. • Chemistry tutor
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Find the roots of the following equation: x^2 + x - 6 = 0

Student should factorise equation to (x-2)(x+3) = 0 This gives roots of 2 and -3
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Answered by Adam R. • Maths tutor
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How do I explain the process of Natural Selection?

VOSSAG V - Variation: all organisms undergo varying amounts of genetic variation due to genetic mutations or environmental factors (such as geographic separation). O - Overpopulation: all populations have th...
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Answered by Ben K. • Biology tutor
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What is the definition of Avogadro's constant and when should I use it?

Avogadro's constant is defined as the number of atoms/molecules in one mole of a substance . It's value is approximately 6.023 x 10^23. It is often used in conjunction with the equation "moles = mass (i...
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Answered by Ben K. • Chemistry tutor
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How can I improve my accent in French?

Going from English to French or from French to English is notoriously tricky accent-wise–while English is an accented language with more nasal and guttural timbres, while French is 'flatter' and tends to be ...
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