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Chemistry Quiz 25 (25 MCQs)

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1. Which gas is used in refrigerators?

2. One of Dalton's conclusions concerning his atomic theory was that all atoms of the same element are-

3. The amount of a particular solute in a given amount of solution

4. Calculate the number of atoms in 1 g of He.

5. The remainder of the sample is the:

6. Which causes an error in an analysis by enhancing or attenuating (making smaller) the quantity being measured?

7. What change is observed at cathode during electrolysis of aqueous copper(II) chloride using carbon electrode

8. Which molecule contains an ester group?

9. How many grams of solute are dissolved in 125.0 mL of 5.00M NaCl?

10. A part of a sample with uniform composition and properties

11. What is the oxidation number of Cl i Cl2O7?

12. How much CO2 could you make from 6g of C? C + O2 $\rightarrow$ CO2

13. Which type of reaction occurs when 2-iodo-2-methylpropane, C(CH3)3I, reacts with aqueous sodium hydroxide, NaOH(aq)?

14. Calculate the % composition by mass of oxygen present in H2SO4.

15. How would you classify the color of a rose?

16. Whats the definition of substance

17. Salt water boils and the water completely evaporates, salt (NaCl) is left in the bottom of the beaker. Which of the following is left in the beaker?

18. How many molecules are in 2.00 moles of H2O?

19. Carbon dioxide is a compound because it _____

20. Catenation is mostly found in

21. It is a substance that cannot be separated into simpler substances by chemical means.

22. Positive ions (cations) will move towards the cathode (-) where they will discharge by _____

23. What reaction is used to make soaps?

24. Salad is an example of _____

25. Which compound can exist as stereoisomers?

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Chemistry Quiz 25 (25 MCQs)

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