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The lattice enthalpies of calcium oxide and magnesium oxide are different. Comment on this difference.

Differences in size of an ionic lattice are directly linked to differences in how exothermic the lattice enthalpy of a salt is. Mg 2+ has a smaller radius than Ca 2+ and thus a higher positive charge density...
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Answered by Javier E. • Chemistry tutor
17379 Views

How do I use Pythagoras?

Pythagoras theorum is used to identify the lengths of any side on a right angle triangle. The theorem is as follows: a 2 + b 2 = c 2 We assume that the hypotenuse (side opposite the right angle) is C. Theref...
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Answered by Abbie W. • Maths tutor
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What is Sonata Form?

Sonata Form is a type of musical structure in 3 main parts (Exposition, Development, and Recapitulation), it is one of the most popular musical structures traditionally used by composers. The first section i...
MB
Answered by Michael B. • Music tutor
5630 Views

What is the difference between 'SER' and 'ESTAR'

Ser is used to talk about permanent or lasting attributes DOCTOR is a good acronym to use: D escriptions, O ccupations, C haracteristics, T ime, O rigin, and R elationships Estar is used to indicate temporar...
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Answered by Charlie M. • Spanish tutor
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If a_(n+1) = a_(n) / a_(n-1), find a_2017

We are given; a 1 = 2, a 2 = 6 a n+1 = a n / a n-1 And we want to find a 2017 . The question is hard because if we tried simply applying the formula to get an answer, we would have to do it thousands of time...
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Answered by Théodore L. • MAT tutor
2742 Views