Chemistry, 06.01.2020 05:31 cameron12502
The half-life of strontium-90 is 28.1 years. calculate the percent of a strontium sample left after 100 years.
1. 76%
2. 63%
3. 0.34%
4. 8.5%
5. 82%
Answers: 3
Chemistry, 22.06.2019 04:30
Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.
Answers: 2
Chemistry, 22.06.2019 09:40
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Answers: 3
Chemistry, 22.06.2019 10:30
Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space
Answers: 2
The half-life of strontium-90 is 28.1 years. calculate the percent of a strontium sample left after...
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