Zing Substances. For ionizing substances, such as NaCl , 1mosm is 1mmole times the number of ions formed when each molecule dissociates. One mmole of NaCl is 58 mg, but when it dissociates, it yields 1 mmole of Na+ (23mg) and 1mmole of Cl ( 35mg). Therefore , 58 mg of NaCl is 2 mOsm of NaCl is put into a beaker and distilled water added to make 1 liter, the osmolarity is 2mOsm/l. A) How many mosm solute will 1 gram of NaCl yield?
He placed the his temperature scale at o degree for the boiling point, and ent downward and placed the freezing point at 100 degrees 10. What did the physicist Amonton contribute to the understanding of hot and cold? Amonton was doing heating, and cooling experiments. He saw that when he cooled the object that when the temp dropped so did the pressure. So he thought what would happen if you kept pushing the pressure back.
Morgan Stanley Experiment 7: Calorie Content of Food Report submitted:3/9/2013 Title: Calorie Content of Food Purpose: To measure the energy content of various food items and to become familiar with energy units like calories and joules. Procedure: measure the energy content of a variety of foods by burning a portion of food and capturing the heat released to a known mass of water in a calorimeter and identify units of measuring heat such as calories and joules. Data: | Marshmallow | Peanut | Popcorn | Food Item Description | Small & White | Small & Salted | Extra Butter | Mass of food & holder – initial | 15.2 | 17.3 | 14.9 | Mass of food & holder – final | 13.7 | 12.5 | 11.4 | Mass of food burnt | .70g | .5g | 0g | Mass of beaker | 4.2 | 4.2 | 4.2 | Mass of beaker & water | 54.2 | 54.2 | 54.2 | Mass of water | 39.9 | 42.6 | 44.83 | Water temp. – initial | 48 | 45 | 47 | Water temp. – final | 36 | 33 | 46 | Delta T (oC change | 12C | 12C | 1 C | Questions: A.
Physioex 9.0 Review Sheet Exercise 1 Cell Transport Mechanisms and Permeability Name: Tiffani Hernandez Lab Time/Date: 12pm / January 23, 2013 Activity 1 Simulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion: Molecular Weight and Size affect the rate of diffusion. 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction?
These values can be determined by an apparatus which is called calorimeter. For every food that organisms consume, the fuel value of the food can be measured by a calorimeter. Likewise one could also use the calorimeter to find out the unknown metal. Purpose The purposes of the lab are to identify the unknown metal and calculate the enthalpy change for the reaction in kJ/mol HCl by using a simple coffee-cup calorimeter. Heat is released when combustion occurs in the calorimeter, causing a rise in the temperature of the water.
Lab 4 – Energy Sources and Alternative Energy Experiment 1: The Effects of Coal Mining |Table 1: pH of Water Samples | |Water Sample |Initial pH |Final pH (24-48 hours) | |Pyrite |6 |7 | |Activated Carbon |6 |7 | |Water |6 |6 | NOTE: Picture below is after 48 hours of all three samples sitting in a warm place. [pic] POST LAB QUESTIONS 1. Develop hypotheses predicting the effect of pyrite and coal on the acidity of water? a. Pyrite hypothesis = If pyrite is in the water source, then it will make the specimen more acidic. b.
To get mass of food burnt, I subtracted the initial mass by the final mass. I then repeated these steps for the other two samples making sure to clean and dry the beaker each time. I got the heat energy gained by multiplying the ΔT by the mass of the water and 4.184 J/g°C. Then I calculated the heat energy per unit mass by taking my heat energy gained and dividing it by the mass of food burnt to get Joules/ g. To get the Cal of the sample I took the J/g and divided it by 4.184 and then divided that answer by 1,000 to get my Calorie. Observations: Marshmallow: I noticed that the marshmallow caught fire pretty quick.
Why are some organisms unable to grow in potassium cyanide (KCN) broth?if it is sensitive to cyanide, it will be unable to grow in KCN broth * * The ducitol fermentation test is positive when the media changes to a yellow color. Why does this happen? What is added to this media to allow you to see the color change? It changes because it is a source of carbon * Why do the lysine decarboxylase and arginine dihydrolase tests require 48 hours of incubation time? It takes 48 hours because it needs more time to incubate and grow Using information from your book and the Internet, answer the following questions.
|Engineering Business Management II |August 15 | | |2011 | |The Case Between McDonald’s Vs. Liebeck Executive Report |Oladapo Leigh (000235952) | Contents Contents 2 Executive summary 3 1. Introduction (McDonald’s V. Liebeck) 4 1.1 McDonald’s 4 1.2 Ms Stella Liebeck 5 1.2.1 The Incident 5 1.2.2 The Injury 5 1.2.3 Action Taken 6 1.2.4 Result & Settlement 6 2. Lessons Learnt From the Case 7 2.1 Ethical Issues 7 2.2 Lesson 7 3. Implementation of Lesson to the New Team 9 References 10 Bibliography 10 Executive summary For better flavour to be extracted from coffee beans they needed to be brewed at high temperatures and to keep the flavour in its best form they needed to be served that way too. This was what McDonald’s based their ideology on for good sales of hot coffees across their drive-thrus.
In the coal gasification process the air and stream are added to the raw coals then heat it to hundred degrees Fahrenheit. The carbon in the coal then react with the oxygen and the water then produces other gases such as carbon dioxide, carbon monoxide, hydrogen and methane. The carbon dioxide from the process is waste and can go to the atmosphere. The other gases can be burned or sent to the next process. Then the second process is after we get the processed and filtered coal, gas or water or carbon dioxide can be added to balance the amount of carbon monoxide and hydrogen.