An unknown element is a mixture of isotopes ¹⁵¹X and ¹⁵³X. The average atomic mass of X is 151.69 amu. What is the percent abundance of ¹⁵³X? Please provide an explanation with the answer :)
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Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon

How many grams are in 68.2 molecules of br2?

Which of these natural resources is non-renewable a.corn b.wind c.geothermal d.natural gas