A compound contains C, H and S. Elemental analysis performed on 172.5mg sample produced 299.0mg CO2 and 163.2mg H2O….
Naming Practice Write the correct name for each formula below. FIRST you must decide if it is ionic or covalent! 1. NaCl 2. K2O 3. CO2 4. NO2 5. N2O4 6. Ca(OH)2 7. NH4Cl 8. SO3 9. CCl4 10. CaS Writing Practice Write the correct formula for each name below. FIRST you must decide if it is ionic or covalent. 1. aluminum fluoride […]
An office heater puts out 2070 Btus (British thermal units) of energy in the form of heat per hour. Given that 1 Btu = 1.055 kJ, how many megajoules of energy in the form of heat can be produced per year (365 days) bAn office heater puts out 2070 Btus (British thermal units) of energy […]
Virtual Lab – Chemical Equations Start the lab by clicking this link. Login using the provided username. This should bring you to the virtual lab interface. Watch the introduction video and read the directions on the screen. Record all of your answers in the journal while conducting the entire lab (including the analysis section). DO […]
a 1.0L buffer solution contains 0.5M HC2H3O2 (Ka=1.8×10-50 & 0.2M NaC2H3O2. Find pH using H-H equation. After adding 0.02M of…
1. Describe the components and internal systems that enable the dental porcelain furnace to operate successfully. 2. Discuss the mechanisms that bond porcelain materials to an alloy interface? 3. Compare the production of porcelain laminate veneers using a refractory die material or the use of a platinum foil matrix. 4. Describe in […]
Calculate the final temperature when a 11.3 gram sample of ice at 0oC is placed into a styrofoam cup containing 119 grams of water at 77.6 oC. Assume that there is no loss or gain of heat from the surroundings. Heat of fusion of ice = 333 Jg-1 Specific heat of water = 4.184 […]
1) What is the diffraction pattern for a horizontal array of lines? a)a horizontal row of dots , b)a square array of dots, c)a vertical column of dots d)a rectangular array of dots where the spacing between the dots is greater in the horizontal direction e)a rectangular array of dots where the spacing between the dots is greater in […]
Write a brief essay describe the benefits of using fusion reactions for nuclear energy instead of fission. Also discuss why we are NOT using fusion. Do you think we will ever be able to do “cold fusion”? Why or why not? Your essay should be at least 2 paragraphs long. Remember to write in complete sentences, using […]
Answer all assigned questions and problems, and show all work. 1. Do the following statements describe chemical or physical properties? 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 denser than aluminum. e. Uranium is a radioactive […]
