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Explain, in general, how a catalyst works

A catalyst is a material that can speed up a reaction, but reamins chemically unchanged at the end of the reaction . A catalyst works by providing the reactants an alternative route of reaction with a lowere...
CL
Answered by Chung L. • Chemistry tutor
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Translate the following short text into French: To celebrate my birthday, I invited my friends to my house. My mother prepared a special meal.

Pour fêter mon anniversaire, j'ai invité mes amis chez moi. Ma mère a préparé un repas spécial.
KW
Answered by Katie W. • French tutor
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What kind of compound is NaCl and why?

Na is a group 1 metal and Cl is a group 7 non-metal so they form an ionic bond.
OA
Answered by Ozlem A. • Chemistry tutor
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Examine the view that the poems in "Tipperary Days" are unfailingly positive about war.

’Rendezvous’ by Alan Seeger is not unfailingly positive about the war, but does romanticise it. The idea of the speaker ‘hav[ing] a rendezvous with Death’ clearly presents the fact that many soldiers believe...
AH
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What word(s) would you use to link two arguments that respectively agree or disagree with a statement or situation given in the writing section of a Unit 3 exam?

There are different expressions you can use to connect two paragraphs that express opposite arguments, such as "sin embargo", "no obstante" and "por lo contrario". The use of th...
JB
Answered by Jesus B. • Spanish tutor
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