Chemistry, 28.12.2019 02:31, Hannahrose911
The half-life of potassium-40 is 1.3 billion years. if a rock that formed 2.6 billion years ago originally contained 5 grams of potassium-40, about grams of potassium-40 would be left in that rock today
Answers: 2
Chemistry, 22.06.2019 22:30, jaylenmiller437
The diagram shows the relationship between scientific disciplines. the names of some scientific disciplines have been removed from the boxes. which scientific discipline belongs in the blue box? a. physics b. biology c. chemistry d. metallurgy
Answers: 2
Chemistry, 23.06.2019 01:30, Thunderalesis7855
Concentrations expressed as a percent by mass are useful when the solute is a a. liquid b. gas c. solid
Answers: 1
The half-life of potassium-40 is 1.3 billion years. if a rock that formed 2.6 billion years ago orig...
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