Determining Your Hourly Rate if You're Salaried. 1  1. Calculate your yearly income. Many people may already know their yearly salary, but in the event that you donât, check your most recent pay stub. 2  2. Calculate how many hours you work in one year. For a quick rule of thumb, you can use a standard formula such as: 7.5 hours per day x 5 days per week x 52 weeks per year = 1,950 hours worked per year. 8.0 hours per day x 5 days per week x 52 weeks per year = 2,080 hours worked per year. Calculate your hourly wage.
Dalton's idea of matter is known as John Dalton's atomic theory. Dalton first proposed his atomic theory in 1803. Matter is composed of very tiny indivisible particles called atoms. Atoms are incapable of being destroyed or created.
Joseph Proust (1754-1826) proposed the the Law of Constant Composition in 1799. This law was very radical at the time and was hotly contested by Claude Berthollet (1748-1822). John Dalton (1776-1844) proposed the Law of Multiple Proportions. This law led directly to the proposal of the Atomic Theory in 1803. He also developed the concept of the mole and proposed a system of symbols to represent atoms of different elements. (The symbols currently used were developed by J.J. Berzelius(1779-1848)).