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Aujourd'hui, de nombreux problèmes liés à l'environnement sont à considérer. En effet, on assiste à un grand nombre d'éléments alarmants qui laissent entendre qu'il est nécessaire de prendre des m...
The electrons are packed in singly occupied orbitals in the 3p subshell in phosphorus, however in sulfur, the 4th electron is placed into an orbital that already has an electron. Because electrons are neg...
When approaching this essay question, it is important to relate how the theme of poverty affects the character’s lives in ‘The Grapes of Wrath’ and as a consequence means they are unable to make a suffici...
barium sulfate is insoluble
cell wall, vacoule, chloroplasts
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