The data in the table below were recorded different indicators to determine the pH of a solution. Based on these data, what is the best estimate for the pH of the solution?

You are performing an experiment in a lab to attempt a new method of producing pure elements from compounds. the only problem is that you do not know what element will form. by your previous calculations you know that you will have 6.3 moles of product. when it is complete, you weigh it and determine you have 604.4 grams. what element have you produced?

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.