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AP CHEMISTRY EXAM QUESTIONS 4 ( Latest 2024 / 2025 ) Actual Questions and Answers 100% Correct
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AP CHEMISTRY EXAM QUESTIONS 4 ( Latest 2024 / 2025 ) Actual Questions and Answers 100% Correct
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AP CHEMISTRY EXAM QUESTIONS 41. The accepted value for a quantity is 5.67 g. If the measured value is 5.89 g,what is the
percent error?: 3.88%
2. What is the sum of these values to the appropriate number of significantdigits?
17.358 + 3.502 + 20.14 = ...: 41.00
3. What is the product of these numbers to the appropriate number of signif-icant digits
56.2 x 9.2057 = ...: 517
4. How many significant digits are in the value 530,405,000: 6
5. How many significant digits are in the value 0.0050340: 5
6. What is the state of matter that has a definite shape and definite volume: -
solid
7. what is the state of matter that has an indefinite shape and definite vol-ume?: liquid
8. what is the state of matter that has an indefinite shape and indefinitevolume?: gas
9. Example of an extensive physical property?: length
10. Example of an intensive physical property?: color
11. Extensive Physical Property: A physical property that depends on how muchof the
mixture there is. (Cannot be used to determine identity)
12. Intensive Physical Property: A physical property that does not depend on howmuch of the
mixture there is, it depends on the identity. (Can be used to identify.)
13. Which is the state change in which a solid becomes a liquid?: Melting
14. What is the state in which a gas becomes a liquid?: Condensation
15. Separation technique that relies on the different boiling points of the partsof the mixture?:
Distillation
16. A 25.0 gram sample of magnesium oxide contains 10.8 grams of magne-sium. What is the
percent of oxygen by mass in this compound?: 56.8%
17. What scientist described a positively charged core (nucleus) in the middleof a lot of empty
space: Rutherford
18. What scientist described an atom made of a solid positively chargedsubstance with
electrons dispersed through it?: Thomson
19. Which scientist developed the plum pudding model/ model that's a circlewith a lot of
smaller circles and particles inside of it: Thomson
, 20. What scientist developed the model that has the nucleus and stuff insidethe model:
Rutherford
21. Who described the existence of the neutron?: Chadwick
22. What has a charge of +1: proton
23. What has a mass of 1 amu: proton and neutron
24. What makes two atoms isotopes of one another?: Same number of protonsand electrons,
different number of neutrons
25. What is the smallest part of an element that retains all the properties of theelement?: Atom
26. How many neutrons are in an atom of chlorine?: 18
27. How many electrons are in a neutral atom of sodium?: 11
28. What is the number of protons in Fe: 26
29. Which is the part of the experiment that serves as the point of comparisonfor the
results?: Control
30. Example of a qualitative measurement?: Color
31. Example of a quantitative measurement?: Temperature
32. "A student conducts an experiment to determine the effect of adding salt onthe boiling
temperature of water"
What is the independent variable?: Amount of salt added
33. "A student conducts an experiment to determine the effect of adding salt onthe boiling
temperature of water"
What is the dependent variable?: Boiling temperature
34. "A student conducts an experiment to determine the effect of adding salt onthe boiling
temperature of water"
What value should remain constant?: Volume of the water
35. "A student conducts an experiment to determine the effect of adding salt onthe boiling
temperature of water"
What is the control?: Sample one, 0 g of salt added
36. "A student conducts an experiment to determine the effect of adding salt onthe boiling
temperature of water"
Reasonable hypothesis?: If salt is added to water, the water will boil at a highertemperature
37. Which of the following is an observation that is evidence of a chemicalchange?
a) the copper was teal
b) the copper dissolved into water
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