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Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand
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Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table
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Quickly what are the following of organisms that existed over a wide area but only for a limited time period called a.soft fossils b.mold fossils c.index fossils d.trace fossils
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Chemistry, 23.06.2019 00:30
Which radioisotope is used to date fossils? a. oxygen-16 b. carbon-14 c. uranium-238 d. carbon-12
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Asample of pure water has a hydronium concentration of 1.0 Γ 10-7 m. what is the ph of the water?...
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