Gas Laws Lab Report

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.

5 A chemistry lab with 22,000 cubic feet was contaminated with hydrogen sulfide. What will the average H2S concentration be if dilution air is provided for 15 minutes? Assume STP, q = 0, C1 =1,500 ppm, mi = 1.0, and Qd = 2000 scfm. You need to include what equation you use, show you step-by-step calculations and include appropriate unit (such as scfm or acfm) for credits

The data below was collected using the procedure described in your lab notebook: Mass (before reaction): test tube + HCl(aq) + stir bar + capsule 27.000 g Mass (after reaction): test tube + HCl(aq) + stir bar + capsule 25.000 g Volume of water displaced from the squirt bottle 146 mL Temperature of the CO2(g) 298.5 K Pressure (atm) 1.012 atm Using this data answer each of the questions below. Enter your answer to three significant figures and enter only the numerical value in the answer box. Calculate the mass of CO2(g). Calculate the number of moles of CO2(g). Calculate the density of CO2(g) in g/L. Calculate the molar mass of CO2 assuming a temperature of 298.5 K. Calculate the Gas constant, R, in L*atm/K*mol. Calculate the % error of the value of the Gas constant, R.

NDIR is usually used to measure a single constituent of an air sample. Think what the name implies and consider how such an instrument might be designed. You may use illustration to explain your answer.

Describe the principle of electrostatic precipitator and cyclone separator. How these equipment/technology can be useful in mitigating source gaseous pollution from industry?

Please answer this question as fast as you can please and tahnk you. I will afterwards write an wonderful review on solving the question. Thank you. Which piece of common lab glassware is most likely to be labelled as TC. This label describes its primary use in the lab. Burette Traditional Funnel Volumetric Flask Volumetric Pipette

A previous Chem 100 student carried out the experiment you did by reacting 0.035 g of magnesium. The following data was collected in their lab notebook. The water temperature was 19.8°C.  The barometer in the lab read 756.9 mm Hg and 31.97 mL of gas was collected The vapor pressure of water at this temperature is 17.32 mm Hg. Calculate the student’s experimental value of R. Report your answer to four places after the decimal.

This question needs to be answered in full and submitted in the Part 2 assignment link. Please note all the relevant variables, i.e. mass, volume, pressure and temperature.At elevated temperatures, sodium chlorate decomposes into sodium chloride and oxygen gas. 2 NaCℓO3 (s) → 2 NaCℓ (s) + 3 O2 (g) A 0.6625 g sample of impure sodium chlorate was heated until the production of oxygen ceased. The oxygen, collected over water, occupied 65.4 mL at 22.0⁰C and 743 torr.(At 22.0⁰C the vapour pressure of water is 19.8 torr) The mass percent of NaCℓO3 (106.4407 g/mol) in the original sample, i.e. percentage purity, in %, is

List some industrial plants in kenya and indicate the gaseous pollutants they emit

Ammonium chloride and calcium hydroxide can react. The ammonia that is released in the reaction is collected in a gas syringe and sealed in. This gas is allowed to come to room temperature which is 32.0oC. The volume of the ammonia is found to be 182 ml. It is now placed in a water bath set at 47.6oC. What will be the volume reading after the syringe has been left in the bath for some time. (assume the plunger moves completely freely)?

When working with gases, it is important to ensure that there are no leaks. If there was a methane gas (CH4) leak, what are two potential hazards that would be created?

Please use Vc=64.20L for hydrogen gas.

Is it possible to get a answer in 20 min?   Explain how you know 3 moles of gas were contained at the maximum volume of 66.2 L. Use the data tables to explain how you knew.    Hint!! the airbag popped above 66.2, the only ones that protected the crash test dummy and didn't pop was 66.2 L.    66.2 is your evidence

TRUE LIES: There are many misconceptions regarding fire. A person must equip himself with factualinformation to guarantee safety. Not all shared information is true. So, can you spot them?Direction: Below are statements about basic information on fire. On your answer sheet, write TRUE if thestatement expresses a correct idea, otherwise write LIE.4. Fire is a thing, not an event.5. Assuming stable fuel, heat, and oxygen levels, a typical house fire is constant in size every minute until the firedies down.6. Earth is the only known planet where fire can burn.7. Water can be produced by fire.8. Using concentrated sunlight, ancient Greeks were able to start fire. A parabolic mirror that focuses solar rays isstill used to ignite the Olympic torch.9. Among the stages of fire, the last stage which is the “decay stage” takes the longest time to finish.10.All fire extinguishers are multipurpose, meaning each one can put out all types of fire caused by any material.NOTE: JUST THE ANSWER ONLY NO…

A reaction at  16.0°C  evolves  272.mmol  of carbon monoxide gas. Calculate the volume of carbon monoxide gas that is collected. You can assume the pressure in the room is exactly  1atm . Be sure your answer has the correct number of significant digits.

Consider a simple mass balance model where 100 CO2 molecules are released into the atmosphere from burning fossil fuels. Half of these molecules are immediately absorbed by the terrestrial biosphere and ocean: fraction f goes to the biosphere and fraction 1-f dissolves into the ocean. Assume fossil fuel combustion consumes 1.4 molecules of O2 for every molecule of CO2 produces and photosynthesis produces 1.1 molecules of O2 for every molecule of CO2 consumed.  If the observed change in oxygen is a decrease of 110 molecules, what fraction of the CO2 was absorbed by the ocean.

Covert 797 mm Hg to atm.

Gas laws May I get some help on this please. Thank you very much.

In an experiment, sulfuric acid reacted with different volumes of sodium thiosulfate in water. A yellow precipitate was formed during the reaction. A cross drawn at the base of each flask became gradually invisible due the formation of this yellow precipitate. The time taken for the cross to become invisible was recorded. A partial record of the experiment is shown. Experimental Record Flask Volume ofH2SO4 Volume ofSodium Thiosulfate Volume ofWater Time 1 5 mL 50 mL 0 mL 19 seconds 2 5 mL 40 mL 10 mL   3 5 mL 30 mL 20 mL   4 5 mL 20 mL 30 mL   Based on your knowledge of factors that affect the rates of chemical reactions, predict the trend in the last column of the experimental record. Use complete sentences to explain the trend you predicted. You do not have to determine exact values for time; just describe the trend you would expect (increase or decrease) and why it occurs.

If your numbers are precise but inaccurate, does it mean it might have been instrumental error? For my lab, I got an average of 8% error, all numbers close to each other. A question asks which was the possible major source of error. Since the numbers are precise but inaccurate, would this mean it is more likely an instrumental error? One of the scales only read two sig figs, which would make it more inaccurate overall. it was for ideal gas. %rsd: 5.08 std: 0.0043

nitric acid chemical name chemical formula other common names molecular weight appearance state (solid, liquid, gas) transparency (opaque, transparent, translucent) colour reactivity data (corrosive, flammable, oxidizer, incompatible chemicals, other chemicals it reacts with) fire and explosion data toxicological data storage information preventative measures to be taken when using the chemical first aid procedures (the 2 most common) disposal method the 4 HMIS ratings (health, flammability, physical hazard and personal protective equipment) at the end, you may also add a short section in which you add a few personal comments about the chemical in question

4- There are different types of materials used to design a car, and these materials determine the durability and sometimes the speed of the vehicle. A- Compare between the properties of aluminum (Al) and magnesium (Mg). Rank these two elements based on their durability and performance. As per your findings which is a better option to use in car making? Include the electronic configuration of each in your answer

How many collisions per second does an N2 (σ= 0.43 nm) molecule make at an altitude where the temperature is 210 K and the pressure 0.16kPa.  Please enter your answer using scientific notation with 3 significant figures, for example: 1.01E9

A 0.5 mole sample of argon gas occupies a volume of 500 mL at 740 mm Hg pressure. At what volume will the pressure of the argon gas be 780 mm Hg if the number of moles are increased to 1.2? Show your work

If gasoline produces only carbon dioxide and water when it burns completely, why is automobile exhaust a source of air pollution? List the pollutants formed and briefly describe their impact.

Calculate the pressure at the base of a mercury column 400 mm high. The mercury density at room temperature is 13.5951 g / cm3.Express the result in column, atmosphere, psi, pascal, and bar units. Calculate the pressure exerted on the drum skin of a diver located at a depth of 20 feet below sea level. Assume that the seawater density is: 1 gr / cm3. Calculate the molar volume of Cu2Te. Express this volume in mol/liter and mol/cm 3 units. ( rm=7.270 g/cm3) Use the ideal gas law and the van der Waals equation to calculate the pressure of ammonia gas at a temperature. T = 300 K the molar volume is V = 24 liters / mol

What are the uses of Laboratory Apparatus below: 1. Aspirator or Pipette Bulb 2. Evaporating Dish 3. Mortar and Pestle 4. Graduated Pipette 5. Acid Burette 6. Spatula 7. Stirring Rod