_Lab 4 Document

I need both of these questions answered.

The Covid-19 pandemic has many experts commenting on the science associated with the virus - origins, vaccines, monoclonal antibodies, masks, social distancing.  It is important to consider what the experts say, but to also evaluate their statements.  We will start with the scientific method.  I want you to outline the scientific method from what you have been taught in previous classes.  You can list steps, parts, process, short descriptions, whatever.  If not taught in previous classes, then you will make your best guess about it.

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?

Write TRUE if the statement is accurate and FALSE if the statement is flawed._________ 1. A gas consists of a collection of small particles traveling in straight line motion and obeying Newton’s laws. _________ 2. The molecules in a gas occupy negligible volume._________ 3. Collisions between molecules are perfectly elastic (that is, no energy is gained or lost during the collision.) _________ 4. There are negligible, attractive, or repulsive forces between molecules._________ 5. The average kinetic energy of a molecule is constant

8 - 14 please

The solvent moves 3 cm in about 10 minutes. Why shouldn't the experiment be stopped at that time instead of waiting 75 minutes for the solvent to move 10 cm? Question 3 options:   More time increases the concentration of mixture components.   More time allows for better separation of components in a mixture.   More time decreases the concentration of mixture components.   Instructors don't like students to be finishing their labs too quickly.

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

Please answer both questions?

A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of carbon tetrachloride, diethylamine, methyl acetate, tetrahydrofuran, and acetone.   The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from his collection of Material Safety Data Sheets (MSDS), the chemist finds the following information:

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

Now it's time to create, analyze and interpret a Chemistry-based graph! Let's do this in steps. Data Measurement number Temperature (°C) Solubility (g NaCl/100 g water) 1 0.00 35.2 2 20.0 36.1 3 40.0 37.0 4 60.0 37.7 5 80.0 38.4 100.0 39.0 Let's assume that you just finished your first research laboratory experiment and you collected the data listed above. Pay close attention to the titles. Based on the titles listed answer and complete the following: a. What would be the title of the graph? b. What set of data would you place on the y-axis? This is your dependent variable-measurable variable whose value depends on the independent variable. c. What set of data would you place on the x-axis? This is your independent variable-measurable variable of which when changed, the value of the dependent variable changes. d. Based on the data listed above, use the following site to make a Line Graph of the data listed above and turn it in here. e. Give a detailed CER writing response to the…

A chemical engineer must report the average volume of a certain pollutant produced by the plants under her supervision. Here are the data she has been given by each plant: Oglala South Fork plant Macon 10 L volume of pollutant 2.742 L 5.13 L What average volume should the chemical engineer report? Be sure your answer has the correct number of significant digits. 29.0 L X

how do i find the freezing point of this graph?

Gaseous NO2 decomposes at 573 K. NO2(g) → NO(g) + ½ O2(g) The concentration of NO2 was measured as a function of time. A graph of 1/[NO2] versus time gives a straight line with a slope of 1.1 L/mol-s. A vessel initially contains 1.9 x 10-2 mol/L NO2. How long, in seconds, will will it take for 12% of the gas to decompose?

Convert 100. ppm to %w/w. The correct value of %w/w

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.