Chemistry, 18.03.2021 02:40, ineedhelp2285

Help please i'll give brainliest! Please answer 18 and don't worry about 19 but please be reasonable and sensible PLEASE thank you!

Help please i'll give brainliest! Please answer 18 and don't worry about 19 but please be reasonabl

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Help please i'll give brainliest! Please answer 18 and don't worry about 19 but please be reasonable...