5-nitrate.handout

Dangerous Paint Stripper Jessica has a summer job working for the city parks program. She has been using a cleaner called “Graffiti Gone” to remove graffiti from the bathrooms. She has to take a lot of breaks, because the chemical makes her throat burn. It also makes her feel dizzy sometimes, especially when the bathrooms don’t have very many windows. On the label, she sees that the cleaner has methylene chloride in it. She feels like she’s managing to get the work done, but she is worried about feeling dizzy. She wants to find out more about this chemical, what harm it can cause, and whether there are safer ways to do this work. Questions for following story. 1. What went right in this situation? 2. What went wrong in this situation? 3. What steps should be taken in this workplace to make sure employees are better protected and prepared the next time?

Read and interpret the following information using the following abstract from a scientific journal article. In 2-3 sentences, summarize what you understand from this research

Strontium phosphate, Sr3(PO4)2Sr3​(PO4​)2​, dissociates when placed in water. This compound has a solubility of 0.112 mg/L in water at 20 °C.   Calculate the Ksp of Sr3(PO4)2Sr3​(PO4​)2​. Please write your answer using scientific notation according to the following format: 0.0010 would be writen as 1.0*10^-3.

Mock Crime Scene Scenario: The police were called to an apartment to investigate complaints of a suspicious sound of a gunshot. The door was locked, so the police entered the apartment with force. A woman was found dead in the apartment, from a fatal gunshot wound to the head. Since she had a gun in her hand, the Medical Examiner is questioning if this was a homicide or if she committed suicide. A neighbor was questioned and told police that she saw the woman’s ex-husband enter the apartment earlier that day. She heard arguing that escalated into screaming right before she heard a gunshot, which prompted her to call the police. The crime scene was processed by police to locate as much evidence as possible. A suicide note was found on the counter. A pen found next to the suicide note was also collected. Multiple cigarette butts were found in an ashtray near the suicide note. A cigarette was found in the woman’s left hand. A gun was found in her right hand. Both were collected as…

1) Listen -5 The Ksp value for calcium sulfate [CaSO4] is 2.40 X 10 and a professor made 1825 mL of a CaSO4(ag) solution but then one of his graduate student accidentally poured in a 0.125 M solution of calcium phosphate [Cag(PO4)2] solution. You may ignore the additional volume coming from the Ca3(PO4)2 solution to make the calculation simpler. Calculate the new sulfate (SO42) ion concentration at equilibrium with this common ion effect. 6.40 x 10-5 5.25 x 10-5 6.21 x 10-5 5.44 x 10-5 201591..docx LAB EXP. #3 -..docx Show All

Olympic athletes are tested to see whether or not they are using illegal performance-enhancing drugs. Suppose that urine samples are taken and analyzed, and the rate of false positive results is 1%. Suppose also that it is too expensive to refine the method to reduce the rate of false positive results.We certainly do not want to accuse innocent people of using illegal drugs. What can you do to reduce the rate of false accusations even though the test always has a false positive rate of 1%?

1) Listen The Ksp value for calcium sulfate [CaSO4] is 2.40 X 10-5 and a professor made 1825 mL of a CaSO4(ag) solution but then one of his graduate student accidentally poured in a 0.125 M solution of calcium phosphate [Ca3(PO4)2] solution. You may ignore the additional volume coming from the Cag(PO4)2 solution to make the calculation simpler. Now that you have calculated the new equilibrium constant (K) with this common ion effect then which way will the chemical equilibrium shift? need more information to be determined at equilibrium chemical equilibrium will shift to the right first and then to the left chemical equilibrium will shift to the right chemical equilibrium will shift to the left 201591..docx LAB EXP. #3 -..docx Show All

This assignment is designed to help you learn how to determine total costs by combining direct and indirect costs for a particular department. In this GHA, you will be determining the total costs for three departments: (1) Physical Therapy (2) Occupational Therapy and (3) Speech Therapy. To determine the total costs, you will need to add the direct costs to the indirect costs using the template provided below. Please use the example provided in the assignment description if you find that you need some support understanding the required calculations. DIRECT COSTS The direct costs for each department are easily identifiable, because they are the costs that are directly attributable to the department. The direct costs are as follows: Physical Therapy (PT) Occupational Therapy (OT) Speech Therapy (ST) Total Direct Costs INDIRECT COSTS The indirect costs will need to be allocated to Physical Therapy (PT), Occupational Therapy (OT), and Speech Therapy (ST). The indirect costs in this…

You are interested to know the Q10 value for mean heart rate (# of beats/10 sec) for a species of crab for the temperature interval of 25°C - 35°C. To find this value, you collect data for these six temperatures and calculate mean heart rate (# of beats/10 sec) for each temperature. Here is the data: 10°C 15°C 20°C 25°C 30°C 35°C Mean Heart Rate (# 23.67 23.89 24.33 27 35.89 37.78 beats/10 sec) What is the Q1o value for heart rate (# of beats/10 seconds) for the temperature interval of 25°C - 35°C? Round your answer to two decimal places.

2 K₂Cr₂O7 (aq) + 8 H₂SO4 (aq) + 3 C₂H5OH(aq) --> 2 Cr₂(SO4)3 (aq) + 2 K₂SO4 (aq) + 3 CH3COOH (aq) + 11 H₂O (1) The above reaction is what occurs in a breathalyzer test. The ethanol (MM = 46.08 g/mol) reacts with the dichromate ion in potassium dichromate (MM = 294.20 g/mol) to produce the green chromate ion in chromium sulfate (MM = 392.21 g/mol). The sample is analyzed in a hand-held spectrophotometer, and the amount of light transmitted is converted into an electrical signal. The signal is then converted to an absorbance value which is proportional to the amount of ethanol in a sample. Calculate the grams of chromium sulfate formed from 0.0250 g ethanol. Enter the value with no units.

19-21

A 23-year-old woman with a history of asthma was brought to the emergency department by ambulance. She was extremely short of breath. Her level of consciousness was diminished greatly, and she was only able to respond to questions with nods or one-word responses. She had a weak cough, with nearly inaudible breath sounds. After drawing blood gases, she was placed on supplemental oxygen. Vital signs: heart rate, 160 bpm; blood pressure, 120/84 mm Hg; temperature, 37°C; and respiratory rate, 36/min. Her initial blood gas and total hemoglobin results were as follows: pH = 7.330 pCO2 = 25 mm Hg pO2 = 58 mm Hg HCO3 = 13 mmol/L tHb = 12.4 g/L QUESTIONS: 4. What clinical findings are most indicative of this patient’s impending failure?

+ terface/acellus_engine.htm?ClassID=1467683063 Use the data below to determine the mass ratio of iron to oxygen for compound 2. Compound 1 2 Et onal Academy of Science. All Rights Reserved. Mass Fe (grams) 15.55 20.98 [20:1 Enter the answer that belongs in the green box. Iron Ratio Cmpd 2 Mass O (grams) 4.45 9.02 Sh Enter

hi please help me with this problem need it until 9:06 am thank you. Kindly please make it short, not long. thank you soo much  fROM THE PICTURE (A) Write down 10 hazards that you can observe in the said picture. (B) Identify the type or category of hazard (physical, chemical, microbiological, allergenic) that you observed and write its category beside the name of the corresponding hazard. To facilitate the checking of your answers, number them accordingly (1 to 10). Example: 1. nail - physical *

Which of the following is a benefit of implementing a Total Productive Maintenance (TPM) program? a) Reduced downtime b) Increased production costs c) Higher inventory levels d) Longer lead times

A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of carbon tetrachloride, diethylamine, pentane, acetone, and tetrahydrofuran. The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from his collection of Material Safety Data Sheets (MSDS), the chemist finds the following information: liquid density - 3 1.6 g·cm carbon tetrachloride diethylamine - 3 0.71 g·cm pentane 3 0.63 g cm 3 0.79 g cm acetone tetrahydrofuran - 3 0.89 g cm Next, the chemist measures the volume of the unknown liquid as 1.427 L and the mass of the unknown liquid as 894. g. Calculate the density of the liquid. Round 3 your answer to 3 significant digits. |lg.cm Given the data above, is it possible to identify the liquid? yes no carbon tetrachloride diethylamine If it is possible to identify the liquid, do so. pentane acetone tetrahydrofuran