IRIS MODULE ANSWERS HAYLIE

CHCASE Dashboard Item 3 A student modek four types of land use in a city. Each model has the same amounts of soil, pebbles, and gravel. A bottle is placed under each model to represent an aquifer, as showWn. Item 4 Item 5 Item 6 Item 7 Aqulfer Aquifer Item 8 Model P Model Q Item 9 Item 1 Item Item Aquifer Aquifer Model R Model S Which model represents land use that will recharge groundwater in a city the most, and why? O Model P; it has green spaces with grass and plants. O Model Q; it has neighborhoods with large front yards. O Model R; it has buildings near paved roads and parking lots. O Model S; it has houses near large trees with deep roots.

Historically, toxicology testing has been focused on one chemical at a time, yet we are rarely expose to chemicals in isolation. Why do you think this approach to testing has been taken? What challenges may be involved in studying mixtures of chemicals?

duction to MasteringChemistry - Attempt 1 duction to Vocabulary Questions Reset Help maple 1. Hardwoods reproduce using flowers and have broad leaves; hardwoods include trees such as pine cedar elm and pine mango 2. Conifer leaves are generally thin and needle-like, while seeds are contained in cones. Conifers cedar include pine and elm elm 3. Deciduous trees lose their leaves seasonally and include trees such as mango and maple 4. Evergreens are plants that maintain their leaves in all seasons and include trees such as elm pine and cedar Submit Previous Answers Request Answer Introduction to Ma. fa トト」 トI fo fo ins prt sc 8% 8 9 10

3-4 sentences   1. Briefly state what separates science from opinion?   2. Water is the most important molecule to life on this planet. Briefly explain why water has the unique properties it does (high boiling point, high freezing point, high capacity of heat, etc.), especially for a small molecule.   3. How does the depth of water affect light availability? How deep does light penetrate ocean water? How might this affect ocean life?   4. The world oceans are dynamic. One reason is because the oceans are in constant motion. One means of water motion are waves. What are waves? What are three factors that affect wave height?

Write dimly, brightly, not at all to the intensity and classify what kind the chemical is depending on its electrical conductivity

Imagine a world in which all the elements existed, but they couldn't form any chemical bonds with each other. What kinds of substances could exist in such a world? What kinds of substances could not exist? What do you think this world would be like?

Once you have completed your chemistry experiments, either by producing products or leaving reagents behind, you must put these substances into the appropriate chemical waste container. The list of items below includes those that will be used in your labs and are thus considered "waste." From this list, select the correct location to deposit each substance once it has been deemed Waste: (match the number on the right with the waste on the left, there will be one number that is not used in the matching) Bromoacetone(1) 1. Inorganic acids and salts 2. Inorganic bases > NaCl(aq) HCl(aq) Acetone(1) Cu(s) NaOH(aq) 3. Solid waste 4. Organics 5. Halogenated Organics 6. Pour down the sink 7. Garbage pail

Choose the best answer among the choices under each question/ statement.  Thank you

Each point on the graph displays the amount of carbohydrates and calories found in ; cup of different vegetables. A line-of-best fit is also shown. 25 20 15 10 1 2 3 4 Carbohydrates (in grams) 5 Which linear equation best represents the line-of-best fit shown? O y = 3x – 4 O y= 4x + 3 O y 4r 6 O y = 5x +7 届 Calculator Calories

You heat 2.53 grams of metallic mercury in air, which produces 2.73 grams of red-orange residue. Assume that the chemical change is the reaction of the metal with oxygen in the air.    What is the mass of oxygen that react? When you strongly heat the red- orange residue, it decomposes to give her back the mercury and release the oxygen, which you collect. What is the mass of oxygen you collected?

Calculate the cost per individual molecule of your pain reliever. Acetaminophen has the chemical formula C8H9NO2. Ibuprofen has the chemical formula C13H18O2. Paracetamol has the chemical formula C8H9NO2.

Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD 50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD 50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD 50 value for humans is the same as for rats. Calculate the number of mg of Allura Red present in an 12 fluid ounce glass of the beverage you used in this lab. Assume that the concentration of Allura Red in the beverage is 0.000034 M. The molar mass of Allura Red is 496.42 grams/mol 1 fl oz = 29.5735 mL

Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD 50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD 50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD 50 value for humans is the same as for rats. Calculate the number of number of glasses of Allura Red sports drink, each containing 8.8 mg of Allura Red, required to reach the LD 50 of 10,000 mg of Allura Red/kg body weight. Assume the person has a body weight of 165 lbs. 2.205 lbs 1 kg !! You may assume two significant figures but do not use sčientific notation. Do not include units with your answer. Your Answer: Answer

Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD 50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD 50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD 50 value for humans is the same as for rats. Calculate the number of number of glasses of Allura Red sports drink, each containing 11.1 mg of Allura Red, required to reach the LD 50 of 10,000 mg of Allura Red/kg body weight. Assume the person has a body weight of 200 lbs. 2.205 lbs = 1 kg You may assume two significant figures but do not use scientific notation. Do not include units with your answer.

We commonly encounter chemical reactions in daily life such as fire and biological metabolism. Cite at least two (2) examples of real-life situations that involve the Law of conservation of mass and explain how these affects you.

What are three physical changes you encounter on a daily, weekly, or monthly basis? What are three chemical changes you encounter on a daily, weekly, or monthly basis? Imagine what life would be like without these types of changes occurring around us all the time. What aspects of life would be significantly harder? Would any aspects of life be easier? Why are these changes essential to our daily life?

Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats. Calculate the number of mg of Allura Red present in an 9 fluid ounce glass of the beverage you used in this lab and use this calculation to determine the number of such glasses of Allura Red sports drink required to reach the LD50 of 10,000 mg of Allura Red/kg body weight. Assume that the concentration of Allura Red in the beverage is 0.000038 M and the person has a body weight of 175 lbs. The molar mass of Allura Red is 496.42 grams/mol 1 fl oz = 29.5735 mL 2.205 lbs = 1 kg You may assume…

Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats. Calculate the number of mg of Allura Red present in an 9 fluid ounce glass of the beverage you used in this lab and use this calculation to determine the number of such glasses of Allura Red sports drink required to reach the LD50 of 10,000 mg of Allura Red/kg body weight. Assume that the concentration of Allura Red in the beverage is 0.000038 M and the person has a body weight of 175 lbs. The molar mass of Allura Red is 496.42 grams/mol 1 fl oz = 29.5735 mL 2.205 lbs = 1 kg You may assume…

Which of the following statements is not true?     No food or drink, including water, is allowed in laboratory     It is okay to taste a chemical     Read and re-read labels on containers of chemicals before opening them     Dispose the chemical waste to appropriate waste container