The mass spectrum of an element with two naturally occurring isotopes is shown below. What is the best estimate of the element's (average) atomic weight? 
Definitions:
External Role
The influence or responsibility an organization or individual has outside of their immediate internal environment, impacting wider community or industry.
Technology
The application of scientific knowledge for practical purposes, especially in industry and commerce, encompassing both physical devices and software solutions.
Globalization
The process by which businesses or other organizations develop international influence or start operating on an international scale, increasing connectivity and interdependence among nations.
Product Lifecycle
The stages that a product goes through from its inception, through growth and maturity, and eventually to its decline and discontinuation in the market.
Q8: Calculate ?<sub>r</sub>H° for the combustion of
Q15: If a hydrogen atom in the excited
Q16: What is the de Broglie wavelength of
Q23: How many moles of sulfate ions are
Q38: Write a balanced net ionic equation
Q58: Which of the following elements has the
Q61: Express the result of the following calculation
Q105: Which statement is NOT true about anorexia
Q130: With _,a person pays attention to the
Q173: A researcher conducts studies to better understand