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Chemistry, 21.06.2019 16:30
What is a scientific theory? a. a scientist's guess about how something works b. the results of an experiment obtained using the scientific method c. a proven fact that will never change d. an idea that is backed by data from many sources
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Which element is the least metallic between cadmium, silver, zinc, or iron?
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Chemistry, 22.06.2019 12:20
Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.
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Chemistry, 22.06.2019 15:00
‘which reaction would most likely require the use of an inert electrode?
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Hòa tan hoàn toàn 6,5g Zn trong dung dịch HCl 10,95%
a) tính khối lượng dung dịch Hcl 10,95% cần dù...
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