1. HONORS & CP CHEMISTRY
MID TERM EXAM REVIEW
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2. 1. How many atoms of hydrogen are present in 3 moles of acetic acid?2

3. 2. What is the molecular formula of butane?
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4. 3. How many moles of carbon are present in 2 moles of butane?
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5. 4. What is the percent composition of ethanol?
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6. 5. Classify the reactions shown below
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7. 6. What number should be written in front of Na to balance the equation Na + Cl2  NaCl ?
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8. 7. What number should be written in front of Fe in order to balance Fe + O2  Fe2O3?
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9. 8.Measure the object with the ruler to the correct number of significant figures.
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10. 9. Classify each as accurate &/ or precise
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11. 10. What symbol expresses uncertainty in a measurement?

12. 11. Name the compound S3O6

13. 12. What is the formula for the compound that is formed by magnesium and hydroxide ions?

14. 13. What is the formula for the compound that will form between calcium and phosphate ions?

15. 14. What is the correct formula for barium oxide?

16. 15. What is the volume of a mole of gas at STP?

17. 16. In a chemical reaction, the total mass of the products compared to the total mass of the reactants is

18. 17. Calculate the number of atoms in 1.40 mol of Ag.

19. 18. Calculate the number of liters of gas in 1.47 mols at STP

20. 19. In the formula Ca3(PO4)2, the total number of oxygen atoms is

21. 20. In the formula 3 Mg(NO3)2, the total number of oxygen atoms is

22. 21. In the formula 3 Mg(NO3)2, the total number of atoms is

23. 22. In the expression 3Mg(NO3)2, the number 2 is known as

24. 23. In the expression 6 Ca3(PO4)2, the 6 is known as the

25. 24. What is the name of the Law that directs us to balance equations?

26. 25. When oxygen is available, nitrogen dioxide is produced from the burning of nitrogen. Write the word equation for this reaction.

27. 26. Give two examples of a chemical change.

28. 27. Classify each of the following reactions:
2 Mg + O2  MgO
CH4 + O2  CO2 + 2 H2O
AgNO3 + NaCl  NaNO3 + AgCl
H2O  H2 + O2
AgCl + Cu  CuCl + Ag

29. 28. Balance each of the following equations
a. NaCl  Na + Cl2
b. S + Cl2  SCl2
c. K + AgCl  Ag + KCl
d. Ca(OH)2 + HCl  H2O + CaCl2

30. 29. Use the experiment shown in the figure to answer the questions
a. A gas was given off, collected in a test tube, and then tested with a burning splint. A “pop/chirp” was heard. What was the gas?

31. 29. Use the experiment shown in the figure to answer the questions
b. The substances Mg metal and dilute HNO3, are called --?

32. 29. Use the experiment shown in the figure to answer the questions
c. Write the correct balanced equation for the experiment