Chemistry Quiz 29 (25 MCQs)

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1. Is used in collecting a pure liquid from mixture of liquids through the processes of evaporation and condensation

2. How are ionic and covalent bonds alike?

3. Average atomic mass of potassium is 39 amu. what is the mass of 2 mol?

4. What property of water allows insects to walk upon it?

5. Which of the following is the CORRECT chemical name of Li2S?

6. Semiconductors are elements that

7. The atomic number is the number of _____ in the nucleus of an atom.

8. Which phrase best describes atoms?

9. The tendency of an atom to prefer to have 8 electrons in the valence shell is known as

10. Which type of reaction is:C7H16 + 10 O2 $\rightarrow$ 7 CO2 + 8 H2O

11. What fundamental quantities are needed to determine density?

12. Gibbs free energy is denoted by what letter which this energy is a combination of enthalpy and entropy in a single value.

13. _____ protons _____ neutrons _____ electrons

14. How many total ELEMENTS are in the following compound:2C2H4O2

15. The symbol for Fluorine

16. Which one is an organic Acid?

17. An atom of carbon has 6 protons and 7 neutrons in its nucleus. If the atom is neutral, how many electrons does it have?

18. The aqueous solution of which acids is called Vinegar?

19. An orbital can at most hold how many electrons?

20. In the chemical equation below, what substance(s) is/are the product(s) of the reaction:Na + Cl2 $\rightarrow$NaCl

21. Using the following equation:Fe2O3(s) + 3H2(g) $\rightarrow$ 2Fe(s) + 3H2O(l)How many moles of iron can be made from 6 moles H2?

22. The acid generally stored in batteries is

23. Which type of reaction is:4 (NH4)3PO4 + 3 Pb(NO3)4 $\rightarrow$ 12 NH4NO3 + Pb3(PO4)4

24. Which chemical reaction shows photosynthesis?

25. Who discovered protons?