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

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

Describe the forces both attractive and repulsive that occur as two atoms move closer together.