Density is an easy way to distinguish between gold (density: approx. 19 g/cm3), fool’s gold (density: approx. 4.5 g/cm3), and sand (density: approx. 2.5 g/cm3). If a large golden rock has a mass of 252 g and a volume of 56 cm3, which type of mineral is it?
1/In experiment #9, we tilt rated sample of KHP with a solution of NaOh. What was the purpose of these tiltration? 2/ you are preparing to perform the tiltrations for experiment#9. Briefly explain why you need to condition the burets? 3/ While performing an experiment, you tiltrated a sample of KHP with NaOH and back […]
Written Assignment 2: Atomic Structure and Chemical Compounds Answer all assigned questions and problems, and show all work. 1. What is the mass number of an iron atom that has 28 neutrons? (3 points) (Reference: Chang 2.13) 2. Calculate the number of neutrons of 239Pu. (3 points) (Reference: Chang 2.14) 3. Write the appropriate […]
Written Assignment 1: Introduction and Measurement Answer all assigned questions and problems, and show all work. 1. Do the following statements describe chemical or physical properties? (10 points) a) Oxygen gas supports combustion. – b) Fertilizers help to increase agricultural production- c) Water boils below 100°C on top of a mountain? d) Lead is […]
Written Assignment 3: Mass Relationships for Compounds Answer all assigned questions and problems, and show all work. 1. How many atoms are there in 5.10 moles of sulfur (S)? (6 points)(Reference: Chang 3.13) 2. How many moles of calcium (Ca) atoms are there in 77.4 g of Ca? (6 points)(Reference: Chang 3.15) 3. What is […]
Written Assignment 2: Atomic Structure and Chemical Compounds Answer all assigned questions and problems, and show all work. 1. What is the mass number of an iron atom that has 28 neutrons? (3 points) (Reference: Chang 2.13) 2. Calculate the number of neutrons of 239Pu. (3 points) (Reference: Chang 2.14) 3. Write the appropriate […]
Distinguish Jacques Charles described the direct relationship between temperature and volume of all gases at constant pressure. Should…
CHEM 121 Solutions can be bought here. Please contact Grafa before buying the answers. If you need just several files – contact Grafa to negotiate the price. Course description: This 5‐credit course provides an introduction to the qualitative and quantitative principles of chemistry for non‐science majors and students enrolled in two‐year allied health science programs […]
Answer the summary questions: *All summary questions must be answered in complete, coherent sentences. write General Procedural Outline: * should be An excellent, detailed procedural outline with a clear explanation of what experiments will be conducted and how the project goals will be met by the planned experiments. This includes proper materials/chemicals/amounts (if known) and […]
As the clinical chemistry supervisor, you are reviewing two analyzers. In order to compare the reproducibilities of these instruments, you run patient samples for glucose on each instrument. Using the following data, determine which instrument shows the greatest precision. Be sure to describe: Explain the reasoning for the significance test used. State null hypothesis, each formula used, […]
