_Lab 4 Document

Classify the substance shown in the sketch below. You can click the other tabs in the sketch to get a magnified view. Be sure you check all the boxes on the right-hand side that are correct for this substance. Note for advanced students: in some sketches the distance between particles has been exaggerated to make it easier to see each individual particle. normal substance 1000X 10,000,000X classification (check all that apply) 8888888888 gas liquid solid element compound mixture solution pure substance homogeneous mixture heterogeneous mixture Ś

TRUE OR FALSE __________ 6. Glassware is clean when no water droplets cling to the inner wall of the vessel. __________ 7. When smelling the odor of a chemical substance, fan your hand over the substance toward your nose which should be centimeters away from the substance. __________ 8. An accident as simple as breaking a beaker containing distilled water in the sink does not need to be reported to the laboratory instructor. __________ 9. Students should turn off cell phones, iPads, and other electronic devices during the laboratory class. __________ 10. It is a good laboratory protocol to call other students’ attention when they do not practice good laboratory safety procedures.

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,…

I need both of these questions answered.

Part B What are each of the following observations an example of? Drag the appropriate items to their respective bins. • View Available Hint(s) Reset Help When person applies perfume in one corner of the room you can smell its fragrance in another room. When a coworker microwaves popcorn, you can smell the vapors in your office 5 minutes later. A balloon in a constant environment gets smaller and smaller over the course of a week as gas leaks through small holes in the rubber. When you drive over a nail the volume of the tire decreases slowly over time as air escapes through the hole. Diffusion Effusion

What materials will the teacher and the students need to complete a lesson on mixing substances in a 5th grade classroom based on the below standard and learning objective? Standard Conduct an investigation to determine whether the mixing of two or more  substances results in new substances.  Learning Objective Given a variety of substances and safety equipment in a classroom setting, students will be able to conduct an experiment to mix two or more substances and observe the results. They will be able to correctly identify whether a new substance has been formed as a result of the mixing, based on observable changes such as color change, formation of a precipitate, or change in temperature, with at least 80% accuracy.

Below are 3 real life situations. Pick two (2) them and explain ALL the science involved in the scenario. This means describe things like what is happening to the gas/liquid/solid molecules or atoms, which principles or laws are at work, why what is happening is happening, and how you know.  At sea level, a pot of water will boil at 100 °C. Suppose you wanted to boil the same amount of water high in the Rocky Mountains. What do you expect the temperature will need to be (generally speaking)? Why?   A can of soda sits in a sunny spot on the window sill for several hours. It is then opened at the same time as a cold can of soda from the refrigerator. What happens and why?   Weather balloons do not float out into space. They reach an altitude of about 15 miles above the surface (3x the height of Mt Everest) and they burst. Why?

True or false? (No need explanation) different types of gloves protect against different types of chemicals.   The most likely route of entry for exposure to chemicals is through your nose and mouth.   Never expose yourself to any meterial unless you know exactly what it is, how it can hurt you and what you need to protect yourself

Rsimi, Nour 2023VVA Chemistry.7b.FA1 An unknown solid substance is heated according to the temperature versus time graph below. Temperature (°C) 70 40 30 20 288 8 2 0 0 5 15 Time (min) 20 00 4 of 5 1 2 3 4 5 25 While the substance is a liquid, at what temperature do the molecules of the substance have the greatest average kinetic energy? 2 % 3 4 5 16 7 8 insert

Chemistry lab students are measuring the amount of oxygen produced by a reaction. The students record the volume of oxygen produced every 15 seconds. In this experiment, which variable is the independent variable and which is the dependent variable? Both variables are dependent variables. Time is the independent variable and volume is the dependent variable. Both variables are independent variables. Volume is the independent variable and time is the dependent variable.

The scientific methods is applied to natural phenomena. What is natural phenomena? Give two examples of natural phenomena and two examples that are not natural phenomena.

Concentrated sulphuric acid is used in this experiment to O help the crystal growth of acetylsalicylic acid speed up the reaction of aspirin synthesis increase the activation energy O avoid impurities getting trapped into the aspirin crystals P Type here to search

Match each change or property with its most appropriate KMT interpretation. Increase pressure Increase volume Increase kinetic energy Elastic collision Depends on mass and speed Inelastic Collision Potential Energy No energy loss Kinetic Energy Increase Temperature More collisions with the walls of rigid container More collisions with the walls of flexible container

Please answer both questions?

Try Again Your answer is incorrect. Classify the substance shown in the sketch below. You can click the other tabs in the sketch to get a magnified view. Be sure you check all the boxes on the right-hand side that are correct for this substance. Note for advanced students: in some sketches the distance between particles has been exaggerated to make it easier to see each individual particle. normal substance 1000X 10,000,000X classification (check all that apply) gas liquid solid element compound mixture solution pure substance homogeneous mixture Oheterogeneous mixture X Ś

12. Pure chlorine enters a process. By measurement it is found that 2.4 kg of chlorine pass into the process every 3.1 minutes. Calculate the molar flow rate of the chlorine in kg mol/hr.

Just answer the 4th item. The substances are acetone and alcohol.

Part 1. A lightly inflated balloon is placed in a freezer. Explain the change to the size of the balloon based on the kinetic molecular theory.Part 2. What would most likely happen to the balloon if it was instead kept outside in the sun for some time? Explain your answer based on the kinetic molecular theory.In both cases, assume the balloon is tied tight enough so that air does not escape.