Element magnesium (Mg) contains three isotopes: 24Mg (23.9850 amu) 25Mg (24.9858 amu) and 26Mg (25.9826 amu). If the abundance of 24Mg is 78.99%, and the average atomic mass of Mg is 24.3050 amu, the abundance of 26Mg should be ___%. (Please keep four sig figs in your result).

Which element is the least metallic between cadmium, silver, zinc, or iron?

Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. an industrial chemist studying this reaction fills a 25.0l tank with 4.5 mol of sulfur dioxide gas and 4.5 mol of oxygen gas at 30.°c. he then raises the temperature, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 1.4 mol. calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. round your answer to 2 significant digits.

Use the measurements in the table to determine which unidentified metal has the highest density. metal volume mass a 10.5 cm3 122 g b 14.2 cm3 132 g c 16.1 cm3 115 g d 12.7 cm3 126 g