Which statement in regards to molar mass is incorrect

14. Which statement in regards to molar mass is incorrect?
a. The molar mass of carbon-12 is 12.0000 g/mole
b. It is the mass of 6.022 * 10 23 atoms of an element
c. It is the mass of 6.022 * 10 23 molecules of a compound
d. It can only be applied to atoms of an element

Questions 15 – 17 refer to the following figures:
15. Which figure represents an element?
16. Which figure represents a single compound?
17. Which figure represents a mixture?
18. Why is the table of elements called the “periodic table”?
19. Which of the following is not true of Mendeleev’s periodic table?
20. Meyer and Mendeleev arranged elements in their periodic tables

21. Relative masses in the modern periodic table are based on the value for
22. The number of elements known today is approximately
a. 12 b. 100 c. 1000 d. 30 million
23. We can recycle materials because atoms 24. A molecule is 25. Which statement is correct in regards to recycling? 26. Glucose is a sugar and is always composed of 40.0% carbon, 53.3% oxygen, and 6.7%
hydrogen regardless of its source. What law does this illustrate?
27. What law do the following pairs of compounds illustrate?
a. CO, CO
2
; b. SO
2
, SO
3
28. How many atoms are present in the following?
29. When 1.12 g cadmium and 1.0 g sulfur are allowed to react, all the cadmium is used up and
1.44 g of cadmium sulfide is formed, and some unreacted sulfur remains. The mass of
unreacted sulfur is:
30. According to Dalton’s atomic theory, when elements react, their atoms combine in (choose
one)