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Cerrena [4.2K]
3 years ago
5

What does a graph with no trend indicate about the variables?

Chemistry
1 answer:
Alborosie3 years ago
8 0
If the graph has no trend which means almost constant, it indicates that the dependent variables will not change when the independent variables change.
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Lt takes 4 hr 39 min for a 2.00-mg sample of radium-230 to decay to 0.25 mg. what is the half-life of radium-230?
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Radioactive decay => C = Co { e ^ (- kt) |

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1) Replace the data in the equation to find k

C = Co { e ^ (-kt) } => C / Co = e ^ (-kt) => -kt = ln { C / Co} => kt = ln {Co / C}

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=> -kt = ln (1/2) => kt = ln(2) => t = ln (2) / k

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Answer: 1.55 hr
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