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- At 25% 10.0181g of an unknown liquid was found to have a volume of 6.75 mL.A student dissolves 12.4g of ammonium nitrate (NH4NO3) in 200.g of water in a well-insulated open cup. She then observes the temperature of the water fall from 21.0°C to 16.9°C over the course of 7 minutes. NH4NO3(s) → NH+4(aq) + NO−3(aq) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to 2 significant digits. Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this reaction. 1. Is this reaction exothermic, endothermic, or neither? 2.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. = kJ 3.Calculate the reaction enthalpy ΔHrxn per mole of NH4NO3. = kJ/molCalculate the volume of liquid in the tank sketched below. Give your answer in liters, and round to the nearest 0.1L
- A student obtains three liquids (A, B & C) in three seperate test tubes. The densities for liquids A, B and C are found to be 2.3 g/ml, 0.95 g/ml, and 0.67 g/ml respectively. Liquid A is poured into Liquid B. Two layers appear. What liquid is likely to be in the top layer?a. Convert 52.6 mM (millimolar) to μM (micromolar) and to M (molar). b. Convert 200.0 μM to mM (millimolar) and to M (molar). c. The new U.S. Public Health Service optimal fluoride concentration in water is 0.700 mg/L. Convert this value to M (molar) and to ppm. Upload your responses here._____1. Which of the ff you can NOT use to measure liquids? a) beaker b) serological pipet c) graduated cylinder d) volumetric pipette _____2. It can be used to contain samples for heating with flames >400 °C a) test tube b) O-ring c) Bunsen burner d) crucible with cover _____3. The ff can be used for boiling a solution of salt, EXCEPT a) beaker b) Bunsen burner c) Buchner funnel d) Wire gauze ____4. Which of the should be used when you want to separate OIL and WATER? a) buret b) separatory funnel c) buchner funnel d) Pasteur pipette
- Based on the charles' law, the following errors in procedure will affect the experimental result. Explain how wach action causes an incorrect result. Procedure(part A) 1) Student A was in a hurry and stopped heating, even though bubbles were still emerging from the rubber tubing. 2) Student B used the measurement of Flask no. 1 to be 250mL, without measuring the volume directed. 3) Student C recorded the temperature in degrees Celcius and used these values in calculations. Procedure(part B) 4) Water remained on the outside of the flask and on the foil when the final mass was determined.Given Benzene - https://fscimage.fishersci.com/msds/02610.htm What is its boiling point (____grams per 100 mL)? Final answer must be rounded off to 2 decimal places and shall NOT have any unit.When the buret in the example delivers from 0.06 mL to 40.00 mL. What is the real volume delivered?
- To control epilepsy, a patient is prescribed 125 mg of phenytoin to be taken three times a day for a week. The volume of 2.5% w/v phenytoin suspension to be dispensed for the prescription is _____ mL. Note: Express answer with two decimal places.kindly help me with this problem solve as neatly as possible and show completesolution. Round your final answer to 4 decimal places and box / highlight all final answers. all values must include proper units with properconversion if needed in your solution. Please follow the format Given,Required,Solution thank you! Additional-the given temperature is 0 degrees 2. The densities of Methane at 0C were measured at several pressures with the followingresults: Pressure (atm) Density(g/L) 1⁄4 0.17793 1⁄2 0.35700 3⁄4 0.53740 1 0.71707 Find the Molecular Weight of MethaneConvert 0.30 mg L-1 to ppb. Put value without unit.