Module 5 Lesson 2 Chemistry Noah Talbott

Module 5 Lesson 2 Chemistry Noah Talbott

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  • I believe there is , let me to explain it 
  • How can i figure out the percent composition by mass for these chemicals
  • We can use the element H2O for an example 
  • Ok I think I am beginning to understand keep explaining please !!
  • I will there is not much left so listen carefully. 
  • There are a few steps to finding the percent composition, the first step is to find the mass of the elements of the elements in the compound such as H2O 
  • There are 2 masses in H2O, there is hydrogen, and oxygen, the atomic weight of 1.00794, and oxygen's atomic weight 15.9994. When you add the atomic weights together your molar mass comes out to be 18.01528 g/moles 
  • ( Mass / Molar Mass ) x 100 So for oxygen it is (15.9994 / 18.01528)x100 which is 88%,and hydrogen is (1.00794 / 18.01528)x100 which is 12%. With that being said this means that water is 12% Hydrogen and 88% Oxygen 
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