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Chemistry Quiz 33 (25 MCQs)

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1. A student calculates that they should produce 12.5g of MgO in lab. After the lab, the weighs the MgO, and finds that he made 10.8g of MgO. What is his theoretical yield?
2. Bonds between _____ are broken during a reaction.
3. The ability or inability of a substance to combine with or change into one or more new substances
4. An ion that has a positive charge.
5. What is the tendency of an atom to attract electrons towards itself in a bond?
6. Which of the following substances are structural isomers of each other? I. CH3(CH2)3CH3II. (CH3)2CHCH3III. CH3CH(CH3)CH2CH3
7. _____ is stored energy.
8. The molecular weight of phosphorus oxide is 283.886 g/mol. Determinethe molecular formula of the phosphorus oxide if the empirical formula is P2O5.
9. Which three compounds can be considered to be a homologous series?
10. All molecules of the alkane homologous series have which ending in their name?
11. Chemistry is the scientific study of _____, its properties and reactions to form new substances.
12. Sodium (Na) is a highly reactive element. Which characteristic of sodium is responsible for its reactivity?
13. A substance composed of atoms of two or more elements chemically united in fixed proportions.
14. Table Sugar (C12H22O11) has how many atoms of hydrogen?
15. Physical properties of a substance include
16. The study of carbon containing compounds.
17. The attraction between two molecules DIFFERENT substances is called _____
18. Matter that can vary in composition
19. What is the symbol of Mercury
20. Oxygen was discovered by which of the following scientists?
21. A single water molecule is made up of _____
22. How many sig figs are there? 0.00400
23. Elements in the Periodic Table of Elements are arranged in
24. Place the following number in scientific notation:0.0000000349600
25. It is one of the frontiers that the chemists are currently exploring in relation to the prevention and treatment of diseases, and research about potent drugs.
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