How is the molar mass of an element determined?

What was the procedure by which case united states vs lopez went to court

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 is the way a mixture is combined different from how a compound is combined?