A 500.0 g sample of aqueous hydrogen peroxide solution contains 31.50% of H2O2 by mass.

What is the mass of hydrogen peroxide in the solution?

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution

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