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Dalton Atomic Theory States - General Chemistry - Quiz, Exercises of Chemistry
Dalton Atomic Theory States, Wavelength of Light, Number of Significant Figures, Chemical Reaction, Properties of Atoms, Temperature in Degrees Celsius, Pure Substance, Homogeneous Mixture. This quiz has got few questions and empty space for answers as well. Hints to questions in this quiz are given above.
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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
- Daltonʹs Atomic Theory states 1) _______ A) that an atom is predominantly empty space. B) that the properties of matter are determined by the properties of atoms. C) that matter is composed of small indestructible particles. D) that energy is neither created nor destroyed during a chemical reaction. E) that all elements have several isotopes.
- What answer should be reported, with the correct number of significant figures, for the following calculation? (433.621 - 333.9) × 11.
2) _______
A) 1.19 × 103
B) 1.187 × 103
C) 1.1868 × 103
D) 1.18680 × 103
E) 1.186799 × 103
- What wavelength of light would you report in units of nm, if the light had a wavelength of 7.60 x 10 -^10 m?
3) _______
A) 760 nm B) (^) 7.60 × 10 - (^3) nm C) (^) 7.60 × 10 - (^19) nm D) 0.760 nm E) 1.32 nm
- If a solution has a temperature of 355 K, what is its temperature in degrees celsius? 4) _______ A) 82°C B) 165°C C) 179°C D) 628°C E) 179°C
- Choose the pure substance from the list below. 5) _______ A) lemonade B) air C) milk D) sugar E) sea water
- If the temperature is 178°F, what is the temperature in degrees celsius? 6) _______ A) 352°C B) 81.1°C C) 67°C D) 451°C E) 378°C
- Choose the homogeneous mixture from the list below. 7) _______ A) mud B) ice water C) salad dressing D) salsa E) kool-aid
- Which of the following represents a physical property? 8) _______ A) Sodium metal is extremely reactive with chlorine gas. B) the unreactive nature of argon gas C) Mercury is a silver liquid at room temperature. D) the flammability of butane fuel E) the tendency of aluminum to ʺrustʺ
- (^) How many significant figures are in 3.408 x 104 m? 9) _______ A) 3 B) 4 C) 5 D) 7 E) 8
- Determine the mass of an object that has a volume of 88.6 mL and a density of 9.77 g/mL. 10) ______ A) 1100 g B) 298 g C) 907 g D) 568 g E) 866 g
- How many moles of Kr are contained in 398 mg of Kr? 11) ______ A) (^) 2.99 × 10 - (^3) moles Kr B) (^) 2.11 × 10 - (^4) moles Kr C) 33.4 moles Kr D) (^) 4.75 × 10 - (^3) moles Kr E) (^) 1.19 × 10 - (^4) moles Kr
- What mass (in kg) does 5.84 moles of titanium (Ti) have? 12) ______ A) 0.280 kg B) 0.352 kg C) 0.122 kg D) 0.820 kg E) 0.632 kg
- What species is represented by the following information? p+^ = 12 n° = 14 e-^ = 10
13) ______
A) Ne B) (^) Si4+ C) Mg D) (^) Mg2+ E) Si
- Determine the number of protons, neutrons and electrons in the following: X
14) ______
A) (^) p+^ = 12 n° = 12 e-^ = 13 B) (^) p+^ = 12 n° = 25 e-^ = 12 C) (^) p+^ = 25 n° = 12 e-^ = 13 D) (^) p+^ = 12 n° = 13 e-^ = 12 E) (^) p+^ = 12 n° = 13 e-^ = 25
- How many atoms of oxygen are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3) is 233.99 g/mol.
15) ______
A) (^) 2.96 × 1024 O atoms B) (^) 1.23 × 1023 O atoms C) (^) 3.19 × 1024 O atoms D) (^) 1.10 × 1024 O atoms E) (^) 2.87 × 1025 O atoms
- Which of the following elements is a nonmetal? 16) ______ A) Ca B) Co C) Cs D) Zn E) P
- Calculate the mass percent composition of sulfur in Al2(SO4)3. 17) ______ A) 9.372 % B) 42.73 % C) 28.12 % D) 21.38 % E) 35.97 %
- (^) What is the mass of 9.44 × 1024 molecules of NO2? The molar mass of NO2 is 46.01 g/mol. 18) ______ A) 341 g B) 205 g C) 294 g D) 721 g E) 685 g
- Molecules can be described as 19) ______ A) a mixture of two or more pure substances. B) a heterogeneous mixture C) two or more atoms joined together in a specific geometric arrangement. D) a mixture of two or more elements that has a specific ratio between components. E) a homogeneous mixture
- (^) If a room requires 25.4 square yards of carpeting, what is the area of the floor in units of ft2? 20) ______ A) (^229) ft2 B) (^) 8.47 ft2 C) (^) 76.2 ft2 D) (^282) ft2 E) (^) 68.6 ft
21. (5 pts.) What is the empirical formula of a compound that is 74.03%C, 8.70%H, and
17.27%N by mass?
22. (5 pts.) Antimony has two naturally occurring isotopes (
121
Sb and
123
Sb). The mass of
121