Which of the following is true about a scientific theory? a. a theory is a proposed explanation for a hypothesis b. a theory can be changed to explain new observations or experimental results c. a theory can be formed after a single experiment d. a theory can never be changed
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6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space
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How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.
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What are the coefficients to balance the following equation? ba+br=babr2
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