Chemistry Quiz 13 (25 MCQs)

Quiz Instructions:

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1. Which gas is filled in refrigerators?

2. What is the main biological function of carbohydrates?

3. Which is heavier, an atom of H or an atom of He?

4. What atom matches this electron configuration? 1s22s22p63s23p64s23d10

5. What is the first thing you must do to solve a stoichiometry problem?

6. Carbon is unique due to the carbon atom's

7. Mass percent of Hydrogen in NaOH is

8. Which of the following dissolves in water because of ion-dipole attractions?

9. Atomic number of magnesium [Mg] in the periodic table _____

10. The mass of one Avogadro number of helium atom is

11. A neutral atom of hydrogen-2 contains (same as 2H)

12. Which intermolecular force is present in all types of compounds?

13. What is the symbol for Tungsten (use your reference tables-it's an element)

14. Which is more basic?

15. This kind of bond occurs when metals and non metals bond to have a full outer shell, one loses and the other gains electrons

16. Why is water necessary to your body?

17. Which notations represent different isotopes of the element sodium?

18. In an exothermic reaction, heat is

19. What is the atomic symbol for sodium?

20. What is the molar mass of (NH4)3PO4

21. The SI base unit for mass is the

22. If a dozen Clementine oranges have a mass of 744 g, what will be the mass of 15 Clementines?

23. PH stands for presence of

24. Matter cannot be created or destroyed; this is the _____

25. Isotopes have different numbers of