A certain element XX has four isotopes. 4.350% of XX has a mass of 49.94605 amuamu . 83.79% of XX has a mass of 51.94051 amuamu . 9.500% of XX has a mass of 52.94065 amuamu . 2.360% of XX has a mass of 53.93888 amuamu . What is the average atomic mass of element XX

Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.

Describing intermolecular forces use the drop down menus to match the type of intermolecular force to its name dipole dipole interactions dipole induced dipole interactions london dispersion forces hydrogen bond van der waals forces done

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins