Ryan GrunerMod5-2

The studies on the toxic effects of chemicals in the environment are important in attempting to measure and assess the toxic effects.  (a)With a suitable examples, identify TWO main effects of toxicity.   ( 4 )  (b)There are several routes of entry of the toxicant into the human body which in the end can cause harmful diseases. From your point of view, why a modern lifestyle can create a pattern of harmful disease due to a toxicant and suggest how to overcome the unwanted interaction from happening.    ( 16 )    ( Total / Jumlah: 20 )

What is Donnan's theory? What is its importance in biophysical chemistry?

P.L Q.1 Please answer the question and make it make sense please, thank you.

subpart questions number 1 and 2 please. For Q2, the "helpful link" is http://genchem1.chem.okstate.edu/1515SP18/Database/VPWater.html

1.Explain the slogan about chemical safety " A spill, A slip, A hospital trip" 2.How do you apply 5s(sort, set in order, shine, standardize, sustain) to attain chemical safety at home and in school?. Enumerate

HW8 #22

give your own guidelines on how to keep a lab area in a school free of hazardous pollutants. The rules should be based on the Toxic Substances and Hazardous and Nuclear Waste Control Act of 1990  known as R.A 6969 and also use reduce, reuse, and recycle strategies.

A discharge pipe releases small amounts of various alcohols from an industrial fermentation process into a lake. Local scientists would like to estimate the rate at which the alcohols are degrading in the lake. One of them, butanol (C4H9OH), is released to the lake at a rate of 20 kg/day. Butanol is measured in the lake water on several occasions at a concentration of 10-4 kg/m3; no butanol is detected in the inflowing stream. Average streamflow at the outlet of the lake is measured to be 3 x 104 m3/day. What is the magnitude of internal sinks of butanol? Assume there is not butanol exchange with the atmosphere.

For each scenario below, describe: (a) How could they have been prevented. (b) What should be the appropriate response to minimize harm. During a chemistry experiment, Jude carefully pours an unknown solution from a test tube into a beaker. His groupmate, John surprises him from behind. Jude accidentally drops the beaker and glass pieces caught his sandaled foot.

A student dissolves 10.3g of ammonium nitrate NH4NO3 in 300.g of water in a well-insulated open cup. He then observes the temperature of the water fall from 22.0°C to 19.3°C over the course of 3.1 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NH4NO3s -> NH+4aq + NO−3aq You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the correct number of significant digits. Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. Calculate the reaction enthalpy ΔHrxn per mole of NH4NO3.

The use of pesticides have allowed agricultural production to increase without an increase in farmed land. Leaching of pesticides from fields into lakes, streams, and the local water table can have detrimental environmental and health consequences. To limit leaching environmental protection regulations require that the half-life of pesticides to be less the 250 days. Report all answers to 3 significant digits A. You are hired to monitor the compliance of pesticides with environmental regulations. You obtain a a pesticide sample with a concentration of 0.2M/L from a local farmer 25 days later you measure the concentration to be 0.19M/L, is the pesticide in compliance with the regulation? Use the formula below: Use the 25 days as the t value and solve for r then subsitute all known values in to find t1/2. Once you find r, find the half-life and compare your t value to 250 days. N(t) = N(0) . ert B) A catalyst can be added to double the decay rate of the pesticide. What is the…

Give an example of an organic chemistry laboratory process that involves medium to high severity and likelihood, and list precautions that can be taken to lower the risk.

Based on a grade 11 chemistry student, answer the following question based on the provided tables: Part G:  Final Identification of the Poison By this time, Tylenol has been pulled off the shelves at all of the stores in the area and a nationwide recall has been announced.  Several suspicious capsules have been found and tested.   The contents of the capsules contain a compound with a nitrogen content of greater than 15% and a carbon content of less than 50%.   What is the poison in the capsule?  Provide calculations to support your answer.

complete #13 & #14, use #15 as an example!

What will the units be for those rate calculations if you collect data from the interactive?   Identify the correct answer for both CO_2CO2​ and O_2O2​ .   Select all that apply: ppm CO_2CO2​ / min   min / ppm CO_2CO2​   min / % O_2O2​   % O_2O2​ / min

When a small amount of iodine is added to a mixture of chlorine and methane, it prevents chlorination from occurring. Therefore, iodine is a free-radical inhibitor for this reaction. Calculate ∆H° values for the possible reactions of iodine with species present in the chlorination of methane, and use these values to explain why iodine inhibits the reaction. (The I¬Cl bond-dissociation enthalpy is 211 kJ>mol or 50 kcal>mol.)

Please answer questions 3a and 3b. Questions are provided in the attached image. Thank you.

Do (5)(i),(ii),(iii) ASAP

Ccan you help me every step by step? Can you help me with number 2 part A and number 2 part B?

I need help solving every step of this problem, please send help ASAP!