Chemistry, 15.04.2021 01:00 josebienka
Question 16.Which of the following statements describes the differences
between endothermic and exothermic chemicalreactions? *
A. Energy is absorbed in endothermic reactions but is released in exothermic
reactions.
B. Energy is conserved in endothermic reactions but is not conserved in exothermic
reactions.
C. Endothermic reactions involve changes in the nucleus of an atom, but exothermic
reactions do not
O involve changes in the nucleus.
D. Endothermic reactions occur when electrons are shared between atoms, but
exothermic reactions occur
when electrons are transferred between atoms.
Answers: 1
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Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?
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Question 16.Which of the following statements describes the differences
between endothermic and exo...
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