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Em um acidente, um caminhão carregado de solução aquosa de ácido fosfórico (h3po4) tombou, derramando cerca de 24,5 toneladas dessa solução no asfalto. quantas toneladas de óxido de cálcio (cao) seriam necessárias para reagir totalmente com essa quantidade de ácido? 2 h3po4 + 3 cao → ca3(po4)2 + 3 h2o a. 14t b. 29t c. 42t d. 7t e. 21t

Ishmael wants to go on vacation with his friend's family. what's the best way he can persuade his parents to say yes? a he can tell them that he will be sad and stay in bed if he can't go. b he can explain that the vacation will be educational and safe. c he can say that he'll hate his parents if they don't let him go. d he can ask them for the money that he needs for the trip.

Fill in the blank with the correct form of the imperfect tense. the children and i (watch) tv.