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Q 1/30
Score 0
1. The mass of an atom expressed in atomic mass units (a. m. u) .
120
electrons
Atomic mass
mole
percent weight
Q 2/30
Score 0
2. The number of particles ( molecules, atoms, compounds) per mole of substance.
120
Avogadro's number
formula weight
percent weight
molar mass
30 questions
Q.
1. The mass of an atom expressed in atomic mass units (a. m. u) .
1
120 sec
Q.
2. The number of particles ( molecules, atoms, compounds) per mole of substance.
2
120 sec
Q.
3. SI unit for the number of particles in a specific substance.
3
120 sec
Q.
4. The molecular mass of carbon tetrachloride.
4
300 sec
Q.
5. The formula mass of sodium chloride ( NaCl ).
5
300 sec
Q.
6. The atoms and molecules that undergo chemical change are known as________.
6
60 sec
Q.
7. A shorthand way of writing a chemical reaction.
7
60 sec
Q.
8. The science of quantitative relationships in a chemical reactions about the masses of reactants & products.
8
120 sec
Q.
9. The atomic mass of 1.008 a.m.u belongs to_________.
9
60 sec
Q.
10. The molecular mass for water.
10
300 sec
Q.
11. The molecular mass for gold .
11
300 sec
Q.
12. Describes a gas as large number of particles, atoms or molecules ,found to be in constant , random motion.
12
60 sec
Q.
13. Iron reacts with oxygen gas the product is ferric oxide. The correct coeficient for this equation to be balance are:
13
300 sec
Q.
14. Iron reacts with nitric acid (HNO3) the result is ferric ( Fe(NO3)3 nitrate and hydrogen gas. The correct coefficients to balance this equation are:
14
300 sec
Q.
15. A reaction in which one element replaces a similar elements in a compound.
15
60 sec
Q.
16. A reaction in which a substance combines with oxygen and releases a large amount of energy in the form of of heat and light.
16
60 sec
Q.
17. It compares the mass of one part or component of a substance to the mass of the whole compound.
17
60 sec
Q.
18. The formula mass of the compound zinc hydroxide is 99.38. Predict which element got the highest percent of the mass among these elements.
18
60 sec
Q.
19. The chemical name for table sugar.
19
120 sec
Q.
20. The chemical name hydrogen peroxide goes to_______.
20
60 sec
Q.
21. The chemical name Glucose goes to ______ as an ordinary substance.
21
60 sec
Q.
22. He found out that at constant pressure, the volume of a fixed amount of a dry gas is directly proportional to the absolute temperature.
22
60 sec
Q.
23. At constant temperarture , the volume of the fixed amount of dry gas is inversely proportional to the pressure exerted by the gas.
23
60 sec
Q.
24. mmHg is also called________.
24
120 sec
Q.
25. Atmospheric pressure varies with height just as water pressure varies with ______.
25
60 sec
Q.
26. Which phase of matter has no definite shape & volume, low density , compressible and expandable.
26
120 sec
Q.
27. All affects the behavior of gases except _________.
27
120 sec
Q.
28. What is the standard temperature of a gas whose volume is 22.4L at 1 atm ?
28
120 sec
Q.
29. The result of decomposition of ammonia.
29
120 sec
Q.
30. It means very large mass can be placed in a small container like methane in an LPG tank.
