Sample of Gas Confined in a Sealed Containe

FINAL REVIEW #1 Name: KEY Which statement best describes the shape and volume of an aluminum cylinder at STP? It has a definite shape and a definite volume. (Correct Answer)   It has a definite shape and no definite volume. It has no definite shape and a definite volume. It has no definite shape and no definite volume.   Which statement correctly describes a sample of gas confined in a sealed container? It always has a definite volume, and it takes the shape of the container. It takes the shape and the volume of any container in which it is confined. (Correct Answer)   It has a crystalline structure. It consists of particles arranged in a regular geometric pattern. As a gas condenses, the average distance between its molecules decreases (Correct Answer)   increases remains the same Which process increases the potential energy of the particles of a sample? condensation   deposition vaporization (Correct Answer) freezing Which phase change represents sublimation? NH₃(l) → NH₃(g) CO₂(s) → CO₂(g) (Correct Answer) KI(s) → KI(l) H₂O(g) → H₂O(l) Which phase change is exothermic? freezing of water (Correct Answer) sublimation of water melting of ice boiling of water At STP, which list of elements contains a solid, a liquid, and a gas? Hf, Hg, He Cr, Cl₂, Ar Ba, Br₂, B (Correct Answer) Se, Sr, S Which Kelvin temperature is equivalent to -24°C? 226 K 249 K 273 K 297 K (Correct Answer) At which Celsius temperature does lead (Pb) change from a solid to a liquid? (melt) 874°C 601°C 328°C (Correct Answer) 0°C Different masses of helium and neon are at the same temperature. Compared to the average kinetic energy of the sample of helium, the average kinetic energy of the neon is   greater less the same (Correct Answer) When the temperature of a substance rises from 35°C to 80°C, the Kelvin temperature will increase by 45 Kelvins decrease by 45 Kelvins increase by 273 Kelvins increase by 318 Kelvins (Correct Answer)   An iron bar at 325 K is placed in a sample of water. The iron bar gains energy from the water when the temperature of the water is 65 K 45 K 65°C 45°C (Correct Answer) How much heat energy is absorbed to completely melt 35.0 grams of H₂O(s) at 0°C? 564 J 146 J 11 700 J 1.00 x 10⁴ J (Correct Answer) What amount of heat is required to completely melt a 29.95-gram sample of H₂O(s) at 0°C? 334 J 2260 J 1.00 x 10⁴ J (Correct Answer) 1.00 x 10⁵ J 15. The volume of a gas is 4.00 liters at 293 K and constant pressure. For the volume of the gas to become 3.00 liters, the Kelvin temperature must be equal to: (1) 3.00 × 293 (2) 4.00 × 293 (3) 3.00 × 4.00 (4) 4.00 × 293 / 3.00 16. A rigid cylinder with a movable piston contains a 2.0 liter sample of neon gas at STP. What is the volume of this sample when its temperature is increased to 30.°C while its pressure is decreased to 90. kilopascals? (1) 2.5 L (2) 2.0 L (3) 1.6 L (4) 0.22 L 17. A gas occupies a volume of 444 mL at 273 K and 79.0 kPa. What is the final Kelvin temperature when the volume of the gas is changed to 1880 mL and the pressure is changed to 38.7 kPa? 1   1. quizlet.com quizlet.com (1) 31.5 K (2) 292 K (3) 566 K (4) 2360 K 18. Which physical property makes it possible to separate the components of crude oil by means of distillation? (1) melting point (2) conductivity (3) solubility (4) boiling point 19. Recovering the salt from a mixture of salt and water could best be accomplished by: (1) evaporation (2) filtration (3) paper chromatography (4) density determination 20. Which property makes it possible to separate the oxygen and the nitrogen from a sample of liquefied air? (1) boiling point (2) conductivity (3) hardness (4) electronegativity 21. At room temperature, a mixture of sand and water can be separated by: (1) ionization (2) combustion (3) filtration (4) sublimation 22. When a mixture of water, sand, and salt is filtered, what passes through the filter paper? (1) water only (2) water and sand, only (3) water and salt, only (4) water, sand, and salt REVIEW #2 Name: KEY The modern model of the atom is based on the work of one scientist over a short period of time one scientist over a long period of time many scientists over a short period of time many scientists over a long period of time   Which conclusion is based on the "gold foil experiment" and the resulting model of the atom? An atom is mainly empty space, and the nucleus has a positive charge. An atom is mainly empty space, and the nucleus has a negative charge. An atom has hardly any empty space and the nucleus has a positive charge. An atom has hardly any empty space and the nucleus has a negative charge.   In the wave-mechanical model, an orbital is a region of space where there is a high probability of finding an electron a high probability of finding a neutron a circular path in which electrons are found   a circular path in which neutrons are found   Which group of atomic models is listed in historical order from the earliest to the most recent? hard-sphere model, wave-mechanical model, electron-shell model hard-sphere model, electron-shell model, wave-mechanical model   electron-shell model, wave-mechanical model, hard-sphere model electron-shell model, hard-sphere model, wave-mechanical model   Which statement best describes electrons? They are positive subatomic particles and are found in the nucleus. They are positive subatomic particles and are found surrounding the nucleus. They are negative subatomic particles and are found in the nucleus.   They are negative subatomic particles and are found surrounding the nucleus. Which two particles make up most of the mass of a hydrogen-2 atom? electron and proton   electron and neutron proton and neutron proton and positron An atom of carbon-12 and an atom of carbon-14 differ in atomic number nuclear charge mass number number of electrons   What is the charge of the nucleus in an atom of oxygen-17? 0 -2 +8 +17 Which statement is true about a proton and a neutron? 1) They have the same masses and the same charges. 2) They have the same masses and different charges. 3) They have different masses and the same charges. 4) They have different masses and different charges.   The atomic mass of an element is the weighted average of the masses of its two most abundant isotopes its two least abundant isotopes all of its naturally occurring isotopes all of its radioactive isotopes