Chemistry, 11.02.2020 05:59 yarrito20011307
Identify the true statement. Choose one: A. Isotopic dating can be used only in a closed system, where neither parent material nor daughter material has escaped. B. The "radiometric clock" starts when a radioactive mineral warms above its closure temperature. C. Carbon-14 dating is used to date anything that was once alive, regardless of age. D. Scientists can date any radioactive material back only three half-lives; after this, there's not enough parent material left to measure.
Answers: 2
Chemistry, 21.06.2019 22:30, micvar9646
Consider the following system at equilibrium. caco3(s) ca2+(aq) + co32–(aq) the addition of which compound will cause a shift in equilibrium because of a common ion effect? ccl4 co2 cuso4 na2co3
Answers: 3
Chemistry, 22.06.2019 22:30, skinniestoflegends
Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.
Answers: 2
Identify the true statement. Choose one: A. Isotopic dating can be used only in a closed system, whe...
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