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What does the symbol (–hfus) indicate in a phase change?
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Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)
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Which of the following elements is most likely to have an oxidation state of +2? a. oxygen (0) b. sodium (na) c. chlorine (ci) d. strontium (si)
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If a weaker solution of sodium bicarbonate was used in beaker b, would that solution require more or...
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