lab#9worksheetinclass

PAP Chemistry-2903012-42100P-1 / Gases / Lesson 148 Aguilar All changes saved 25. The kinetic molecular theory says that collisions between particles are elastic, but real-world collisions do not follow this assumption. What is some of the kinetic energy changed into after a collision? O heat O light O potential energy O chemical energy SAVE & EXIT SUBMIT ALL ANSWERS PREVIOUS 25 of 25 96

1. What is the functional purpose of an airbag?   The functional purpose of an airbag is to give a cushioned surface for the driver of a vehicle during the time of the collision. On page one, paragraph three, states, “They are designed to supplement seatbelt restraints and help to distribute the load exerted on a human body during an accident.” The airbag helps to absorb and distribute the force of the impact caused by the result of collision. Since the airbag is filled with a gas (N2) it can slow down the forward motion which can prevent someone from creating a sudden collision in the steering wheel with a greater force. It may also prevent the person inside from being thrown from the vehicle during a crash. Thus, the functional purpose of an airbag is to protect the driver from collision with the steering wheel by minimizing the force of impact.           2. While a series of events take place within the airbag system, what ultimately causes the airbag, stored in the steering column,…

1. What is the functional purpose of an airbag?   The functional purpose of an airbag is to give a cushioned surface for the driver of a vehicle during the time of the collision. On page one, paragraph three, states, “They are designed to supplement seatbelt restraints and help to distribute the load exerted on a human body during an accident.” The airbag helps to absorb and distribute the force of the impact caused by the result of collision. Since the airbag is filled with a gas (N2) it can slow down the forward motion which can prevent someone from creating a sudden collision in the steering wheel with a greater force. It may also prevent the person inside from being thrown from the vehicle during a crash. Thus, the functional purpose of an airbag is to protect the driver from collision with the steering wheel by minimizing the force of impact.           2. While a series of events take place within the airbag system, what ultimately causes the airbag, stored in the steering column,…

За. Bromine and methanoic acid react in aqueous solution. Br, (aq) + HCO0Н (ад) — 2Br (aq) + 2H" (аq) + Со, (g) The reaction was monitored by measuring the volume of carbon dioxide produced as time progressed. o 5 10 15 20 25 [Source: © International Baccalaureate Organization 2019] 30 20 40 60 80 100 120 140 160 Time / s [Source: © International Baccalaureate Organization 2019] Determine from the graph the rate of reaction at 20 s, in cm³ s1, showing your working. 3b. Outline, with a reason, another property that could be monitored to measure the rate of this reaction. 3c. Describe one systematic error associated with the use of the gas syringe, and how the error affects the calculated rate. 3d. Identify one error associated with the use of an accurate stopwatch. Volume of carbon dioxide / cm T m mm mo

Robert Boyle, in his discovery of the “spring of the air, “ was working on the property of gases called compressibility. The compressibility of gases is extreme to that of liquids, like brake fluid and water. Briefly describe the mechanism of what really happens when you compress a gas.

5. Another liquid, butanol, with the formula, C4H9OH, has a molecular weight of 74.0 g/mol and the molecular structure illustrated below: H HHH H-C-C-C-C-O-H H HHH Predict how butanol's evaporation rate should compare to ethanol's and methanol's evaporation rates. Explain your prediction using the molecular structures and weights of ethanol, methanol, and butanol, the types of intra- and inter- molecular bonds they make and the observations you made of ethanol and methanol in this investigation to support your prediction.

Gaseous nitrosyl chloride (NOCl) is injected in a 1.0-L container where it starts decomposing irreversibly. 2NOCl(g) → 2NO(g) + Cl2(g) The container is insulated (no heat exchange with its surroundings) and has a movable part that allows one to change its volume. Before the reaction is over, the container’s volume is abruptly increased to 1.5 L. Use collision theory to explain how this will affect the rate at which NOCl decomposes.

Gaseous nitrosyl chloride (NOCl) is injected in a 1.0-L container where it starts decomposing irreversibly. 2NOCl(g) → 2NO(g) + Cl2(g)The container is insulated (no heat exchange with its surroundings) and has a movable part that allows one to change its volume. Before the reaction is over, the container’s volume is abruptly increased to 1.5 L. Use collision theory to explain how this will affect the rate at which NOCl decomposes. (We saw four factors, two of which should play a role here.)

"71 36 K/s ill.l O 10:01 يستخدم التطبيق المیکروفون Me et من 6 / What are the goals of adding vinegar to milk 2/ What are the results of adding vinegar to milk 3 / What is the benefit of adding vinegar to milk 10:01 زهراء 21.03.17 الساعة ص 10:01

Anna was asked to identify and explain if the equation CO2 (g) → CO2 (I) was an endothermic or exothermic reaction. However she got it wrong. What is her error and what should the answer have been? Anna's statement: The equation is an endothermic reaction because the energy is released from gaseous CO2 to the surroundings to become liquidCO2 causing the molecules to speed up. Format В I U B ... >

1955 Robert Wentorf. Graphite to diamond at 2000°C and 106 atm. Even though graphite is more stable than diamond at 25°C and atmospheric pressure, the conversion is very slow. A process called chemical vapor deposition uses Carbon sources like methane to release carbon atoms in presence of hydrogen gas and deposit it as diamond at low pressure and temperature (600°C) Reference: Chemistry: An atoms first approach, Zumdahl & Zumdahl, Cengage Learning, 2012. Question: Based on the above phase diagram: Comparing graphite and diamond, which one is denser? How many triple points? Explain

Explain why scientists do not use a standard set of steps for everyinvestigation they conduct.

According to Wikipedia, Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon. The method was developed in the late 1940s at the University of Chicago by Willard Libby, who received the Nobel Prize in Chemistry for his work in 1960. It is based on the fact that carbon- 14 is constantly being created in the atmosphere by the interaction of cosmic rays with atmospheric nitrogen. The resulting carbon-14 combines with atmospheric oxygen to form radioactive carbon dioxide, which is incorporated into plants by photosynthesis; animals then acquire carbon-14 by eating the plants. When the animal or plant dies, it stops exchanging carbon with its environment, and thereafter the amount of carbon-14 it contains begins to decrease as the carbon-14 undergoes radioactive decay. Measuring the amount of carbon-14 in a sample from a…

2.) It’s a bad day in the lab!  Two students are doing experiments.  Each is 20 feet away from the professor.  At the same time, each of them lets the same amount of a smelly gas into the room.  One of them releases ammonia, NH3, and the other releases SO2.  NH3 has a pungent odor, and SO2 smells like rotten eggs.  The professor has no idea that this has happened, until she smell the first gas.  Which chemical will the professor smell first?   (NH3 or SO2)                                .  If the professor starts to smell the first gas 42. seconds after the gas is released, how long will it take her to smell the second gas?       sec. * Note: It is unsafe practice to work with these chemicals in an open lab.

Nitric oxide reacts with hydrogen to release large amounts of chemiluminescence with the characteristics of the highly cytotoxic species. The following data were measured for the reaction of nitric oxide with hydrogen: Data number 1 2 3 2 NO(g) + 2 H₂(g) → N₂(g) + 2 H₂O(g) [NO] (M) 0.1 0.1 0.2 [H₂] (M) 0.1 0.2 0.1 Based on the data, (a) Determine the rate law for this reaction. (b) Calculate the rate constant. (c) Calculate the rate when [NO] = 0.050 M and [H₂] = 0.150 M Initial rate (M/S) 1.23 x 10-³ 2.46 x 10-³ 4.92 x 10-³

Which of the following best define systems thinking in chemistry? Systems thinking is learning about chemistry within real-word contexts. Systems thinking focuses on the interdependence between chemistry components, as well as the influence of chemistry on other systems. Systems thinking is a way of thinking about chemistry systematically.

Use the information given below to answer the question 2NO  N2O2 fast     N2O2 + H2  N2O + H2O slow     N2O + H2  N2 + H2O slow The first step is _____; the second step is _____; and the third step is _____.     a. bimolecular; unimolecular; bimolecular   b. bimolecular; bimolecular; bimolecular   c. unimolecular; bimolecular; bimolecular   d. bimolecular; bimolecular; unimolecular

Pentaerythritol tetranitrate (abbreviated PETN, chemical formula C₂H₂N₂O₁₂2) is an explosive material with a structure that is very similar to nitroglycerin. It is one of the components of plastic explosives such as Semtex. The explosion of PETN can be represented by: C5H8N4O12 (s) → 2 CO(g) + 4 H₂O(g) + 3 CO2(g) + 2 N₂(g) A plastic explosive charge is formed into a cylinder about 30 cm long and about 2 cm in diameter. It weighs about 221 grams and is 58.5% PETN by mass. What is the total number of moles of gas produced when this plastic explosive charge explodes? mol gas

6. Which statement is NOT an assumption of the kinetic molecular theory When particles collide, their total kinetic energy is decreased Gas particles are small and take up little volume Particles travel in constant, random, straight-line motion until colliding Particles do not attract or repel each other acer