Determine the location of the last significant place value by placing a bar over the digit. (Example: 1.700)
II. 8,040
14. 0.0300
17. 699.5
19. 2.000 x 102
12. 0.90100
15. 90, 100
18. 4.7 x 10-8
20. 10,800,000.0
13. 3.01 x 1021 16. 0.000410

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.

List and describe the neurological effects of the vocs and other air pollutants,as described by dr.theo colborn