A compound is found to have a composition of 54.092% Ca, 43.187% O, and 2.721% H. What is the empirical formula of the compound?

If oil spills continue, all of the following should be expected except (2 points) death of aquatic life. polluted groundwater. decreased soil productivity. increased global temperatures.

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

How many moles does 80.0 h2o respresent