A student performs a dehydration experiment to determine the molecular formula for CuSO4 . X H2O. The student begins with a hydrate mass of 1.6137 g, and 1.0293 g of anhydrate remains at the end of the experiment. Calculate the value of X; upload a file showing all work with units for full credit.

In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opinions and social values of scientists, ensuring valid information. the results of investigations lead to new questions, which lead to new investigations. they are not influenced by the research of earlier scientists, so they are able to address gaps in understanding.i

Give one example of a pure (exact) number and of an estimated (measured) number.

Scuba divers use tanks of compressed air to them breathe. gases can be compressed because?