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Why can ammonium sulfate be described as a salt?

A salt is an ionic compound which is made up of two groups of oppositely charged ions. The overall compound of a salt compound must have an overall electrical charge of 0. Ammonium sulfate, (NH4)2SO4, can be...
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Answered by Chloe R. • Chemistry tutor
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What are the main forms of river erosion?

Definition : River erosion is a process through which the riverbed, banks and rocks are worn away. There are 4 key types of river erosion: 1. Attrition This occurs as smaller rocks which are carried along by...
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Answered by Chloe R. • Geography tutor
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How would I solve x^2 + 7x + 10 = 0

The first step of solving this equation to find out what x is, is to factorise it. This means grouping it into a set of double brackets which will take the form (x+a)(x+b)=0. The a and the b must give the co...
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Answered by Will N. • Maths tutor
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Factorise (x+3)(x-8)

(x+3)(x-8) x*x= x^2 x*-8= -8x 3*x= 3x 3*-8= -24 =x^2 - 8x + 3x - 24 =x^2 - 5x - 24
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Answered by Nikhitha J. • Maths tutor
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What is the difference between ser and estar?

Describing people Unlike english, Spanish has two verbs for "to be": ser and estar. As a general rule ser is used to describe or answer questions about who or what something is, while estar describ...
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Answered by Thomas B. • Spanish tutor
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