The total bonding energy for the products of a reaction is 2535 kj/mol and the bonding energy of the reactants is 1375 kj/mol. calculate the change in enthalpy, and classify the reaction as endothermic or exothermic. -1160 kj/mol, endothermic 1160 kj/mol, exothermic -1160 kj/mol, exothermic 1160 kj/mol, endothermic

Micah wrote the following argument: our city should start a garden lottery that would award winners a free plot of land in one of the city’s abandoned lots to encourage community gardening. community gardening brings many benefits to a community, including a sense of belonging and opportunities to meet new people. gardening creates personal bonds between people of all ages. as a result, people feel connected to their neighbors, and crime decreases. which relationship does the phrase “as a result” clarify? a. the relationship between the claim that crime will decrease and the reason that community gardens foster a sense of community togetherness b. the relationship between the claim that community gardens bring many benefits to a community and the reason that people feel more connected to their neighbors c. the relationship between the claim that gardening creates bonds between people and the reason that people feel connected to their neighbors and crime decreases d. the relationship between the claim that free plots of land should be raffled in a lottery for community gardening and the reason that, as a result, neighbors will communicate more, and crime will decrease

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

As sentenças a seguir trazem a mesma situação: a entrada de animais. leia: i – é proibido entrada de animais. ii – é proibida a entrada de animais. iii – é proibida entrada de animais. assinale a alternativa correta em que indica o uso correto do artigo nas sentenças: escolha uma: a. as sentenças i, ii e iii estão corretas. b. as sentenças i e iii estão corretas. c. as sentenças i e ii estão corretas. d. somente a sentença i está correta. e. as sentenças ii e iii estão corretas.