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MTTC Integrated Science (Secondary): Chemical Changes in Matter Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. A piece of copper wire contains 5 moles of copper atoms. What is its mass?

Question 2 2. The oxidation numbers of H and K in KH are respectively _____ and _____.

Question 3 3. In covalently bonded molecules, oxidation and reduction are determined by:

Question 4 4. An endothermic reaction is:

Question 5 5. A piece of pencil graphite (made of carbon atoms) has a mass of 0.12 grams. How many moles of carbon atoms are in the lead?

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Question 6 6. The pH scale is a way of measuring _______.

Question 7 7. Which of the following is a strong base?

Question 8 8. A computer chip contains 1.20 x 10^23 atoms of silicon. What is its mass?

Question 9 9. In redox reactions, how are oxygen atoms generally balanced?

Question 10 10. When both the reactants and the products of a reaction exist simultaneously because both forward and reverse reactions are competing, you have a _____.

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Question 11 11. Suppose you were teaching a science class to middle school students. Because you want to show them an impressive chemical reaction, you decide to dissolve zinc in hydrochloric acid. You add more acid than usual and throw in pieces of zinc. What factor is not going to impact the reaction rate?

Question 12 12. What are the oxidation numbers of the atoms in the compound CF4?

Question 13 13. Enthalpy change is

Question 14 14. Which of the following mole ratio is NOT appropriate to the equation 6CO2+ 6H2 O = C6 H12 O6+ 6O2?

Question 15 15. How is a mole ratio used?

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Question 16 16. How many moles of Na are needed to produce 15 moles of NaCl in the reaction 2Na + Cl2 = 2NaCl?

Question 17 17. How is reaction rate measured?

Question 18 18. What is a net ionic equation?

Question 19 19. Maria is conducting an experiment, and creates a substance that seems to be a proton acceptor as well as a proton donor. Which of the following would be the BEST for Maria to use in order to define what type of substance she has created?

Question 20 20. Identify the element which is the strongest reducing agent.

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Question 21 21. A redox reaction can easily be explained as:

Question 22 22. In the complex ion Cu(H2O)2 +, what is the charge on the copper ion?

Question 23 23.

What products would you expect from a reaction between HCl and KOH?

I. KCl

II. H2O

III. KH

Question 24 24. The pH scale is a _______ scale.

Question 25 25. Identify the function of oxidation numbers.

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Question 26 26. What is a coordination compound?

Question 27 27. What does an increase in temperature do to the reaction rate?

Question 28 28. Calculate the value of the equilibrium constant, K, for the system below, if 0.0954 moles of CO2, 0.0454 moles of H2, 0.0046 moles of CO, and 0.0046 moles of H2O vapor were present in a 1.00 L reaction vessel at equilibrium.

Question 29 29. What are solubility rules?

Question 30 30. The reactant in a redox reaction that readily donates electrons is called a/an:

MTTC Integrated Science (Secondary): Chemical Changes in Matter Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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