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Explain the trend in the boiling temperatures of the elements on descending group 7, from fluorine to iodine.

Understanding the question: The process of boiling is heating the mixture until the liquid turns into gas. This process requires breaking intermolecular forces (interactions between molecules (eg: hydrogen b...
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Answered by Berna Y. • Chemistry tutor
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How do you factorize a quadratic equation which has a coefficient of x^2 other than 1?

Factorise 6x 2 + x - 2 = 0 Firstly, multiply the coefficient of x 2 by the last number: 6 x -2 = -12 List all the factors of 12 and see which pair adds/subtracts to make 1: Factors of 12: [1,12] [2,6] [3,4] ...
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Answered by Aleezeh A. • Maths tutor
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What is the difference between an opinion and an argument, and which one helps us better understand the past?

An opinion is usually defined as a belief or view held by an individual. It can be formed by or based upon virtually anything, and an opinion is not necessarily based upon what is true, accurate or informed....
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Answered by Joe H. • History tutor
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Describe the structure of a protein.

Proteins are large biomolecules which play a key role in many of the body's proccesses. Their structure can be broken down into 4 main domains. The primary structure consists of a unique sequence of amino ac...
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Express the polynomial x^3+x^2-14x-24 as a product of three linear factors.

Firstly, use the factor theorem to determine one factor. Substitute factors of 24 into the equation, beginning at plus or minus 1 and then increasing. The first factor found will be -2, therefore (x+2) is a ...
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Answered by Scarlet W. • Maths tutor
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