Anewly discovered element, y, has two naturally occurring isotopes. 90.3 percent of the sample is an isotope with a mass of 267.8 u, and 9.7 percent of the sample is an isotope with a mass of 270.9 u. what is the weighted average atomic mass for this element? 269.4 u 268.1 u 269.0 u 270.6 u

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

In an exothermic reaction, energy may be released to the surroundings in the form of question 4 options: heat light thermal all of the above