Chem 120 concepts Study guides, Class notes & Summaries

ATOMIC STRUCTURE In many ways, this lesson is the start of your journey into chemistry. In this foundational lesson, we will learn about the building blocks of matter: atoms. Alchemists, the precursors to chemists, had a saying: “As above, so below”. A modern interpretation of this saying is that the properties of what we can see can help us understand the properties of what we cannot. In this lesson, we will learn how the properties of atoms determine the properties of the world around us.

CHEM 120 Unit 6 Lab: OL Lab 10: Nuclear Chemistry Objectives: Identify the differences between chemical reactions and nuclear reactions. Identify the concept of radioactive decay. Identify the n uclear changes associated with alpha, beta or gamma decay. Write the products of nuclear reactions involving alpha, beta or gamma emissions. Explain the concept of half-lives and complete half-life calculations. Not all atoms are stable. When atoms are born in a nuclear reactor, whether it be the heart o...

MCAT AAMC FL 1 CHem and Physics Questions and Answers 2023 In the chromatography of the reaction mixture, water absorbed on cellulose functioned as the stationary phase. What was the principal factor determining the migration of individual components in the sample? A.Hydrogen bonding B.Solute concentration C.Stationary phase concentration D.Thickness of paper The correct answer is A. This is an Organic Chemistry question that falls under the content category "Separation and purificat...

CHEM 120 Week 2 Discussion 1 - Chemical Names (graded) Sulfates, sulfites, nitrates, nitrites—how does one keep all of these similar but different names straight? Let’s begin this discussion by talking about the naming of different compounds. Why would it be important to make sure that you know which compound is associated with which name? To apply these concepts, look at problems 18 & 22 on page 122. Choose one part of the problem, & provide your answer. Check out the following ex...

CHEM 120 Week 2 Discussion 1 - Chemical Names (graded) Sulfates, sulfites, nitrates, nitrites—how does one keep all of these similar but different names straight? Let’s begin this discussion by talking about the naming of different compounds. Why would it be important to make sure that you know which compound is associated with which name? To apply these concepts, look at problems 18 & 22 on page 122. Choose one part of the problem, & provide your answer. Check out the following ex...

CHEM 120 OL Lab 6: Solution Preparation: From salt to solution Part 1: Complete the Labster Lab: Solution Preparation: From salt to solution 1. Which equation do we need to find out how many moles of NH4Cl would there be in 500 ml of a .300 M solution of it? n= CxV 2. How do we then get from moles (n) to mass (m)? m=nxM 3. What was the first step of using the balance before adding anything to a weighing dish? Tare the balance with the weighing dish and the balance closed 4. Why is it that t...

CHEM 120 Unit 1 Lab: OL Lab 1: Chemistry Safety Learning Outcomes Create biodiesel from algal oil Identify the hazards posed by chemicals and how to handle them React quickly and save lives in c ase of a fire emergency Use the CAS numbers to plan your experiment Identify how to dispose of halogenated and non-halogenated waste Identify H and P phrases in the safety data sheet Safely use a chemical fume hood Introduction Are you ready to work in a chemistry lab? In the Chemistry Safety simulation ...

CHEM-120 Unit 4 Lab: OL Lab 8: Acids and Bases CHEM120 OL, Week 4 Lab Observations: Record three observations from the simulation. The temperature scale is arbitrary. Change in gas physical pro perty is linked to temperature change. Ideal Gas law states that volume is proportional to temperature. Answer the questions below: 1. If the pressure of a fixed volume of gas decreased in a sealed container, what variable would you think changed? Did this variable increase or decrease? Pressure of gas is...

CHEM 120 Week 2 Discussion 1 - Chemical Names (graded) Sulfates, sulfites, nitrates, nitrites—how does one keep all of these similar but different names straight? Let’s begin this discussion by talking about the naming of different compounds. Why would it be important to make sure that you know which compound is associated with which name? To apply these concepts, look at problems 18 & 22 on page 122. Choose one part of the problem, & provide your answer. Check out the following ex...

1. Anthropogenic derived from human activities 2. Erosion The process by which wind, water, ice, or gravity transports soil and sediment from one location to another 3. Runoff Part of the water cycle where an excess of water runs down and does not sink into the soil and eventually makes it to the rivers, lakes, and oceans. 4. Denitrification process in which fixed nitrogen compounds are con- verted back into nitrogen gas and returned to the atmosphere 5. Nitrification ammonia (NH3) is conv...