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Why does the structure of lithium oxide allow it to conduct electricity under certain conditions?

Lithium oxide has the formula Li 2 O. It has an ionic structure as it is formed from a metal and a non-metal. It has lithium ions with a +1 charge, as lithium is found in Group 1 of the periodic table, and o...
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Answered by Amy I. • Chemistry tutor
12567 Views

Simplify fully (3x^2-8x-3)/(2x^2-6x)

First I would look for common factors in either the numerator or the denominator. The denominator has the common factor of (2x) so i would factorise it by 2x in order to give (3x 2 -8x-3)/(2x)(x-3)Then I wou...
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Answered by James A. • Maths tutor
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Evaluate the Strange Situation as a method for investigating types of attachment.

Ainsworth devised an observation called the strange situation to measure types of attachment. The Strange Situation involves placing a child in a controlled environment, whereby they would be observed under ...
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Answered by Maryan H. • Psychology tutor
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There are 12 beads in a bag, all identical in shape but different in colour (4 are yellow, 3 are red, and 5 are blue). What is the likelihood of me picking out a blue and a yellow bead (in any order, and without replacement)

((4/12) (5/11)) + ((5/12) (4/11)) =((1/3) (5/11)) + ((5/12) (4/11)) =((1/3) (5/11)) + ((5/3) (1/11)) =5/33 + 5/33 =10/33
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A-level circle question

Answer will be provided during session (easier to write maths than to type)
Answered by • Maths tutor
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