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Two balloons have a volume of 1.5 L. One contains helium gas and the other argon gas. They are tethered together and are at the same temperature and pressure. Which balloon has the greater number of gas particles? Which balloon has the greater mass? Which balloon has the greater density?
Consider the hydrazinenitrogen tetroxide rocket fuel reaction: 2N2H4 + N2O4 3N2 + 4H2O How many grams of N2H4 will be consumed by 46 g of N2O4?
How much heat is required to warm 1.20 L of water from 20.0 degrees C to 100.0 degrees C ? (Assume a density of for the water.)
A student plans to titrate 25 mL of a .134 M HNO3 solution with .179 M NaOH solution. Calculate the volume of NaOH that will be needed to reach equivalence point.
Draw a phase diagram labeling all the above points. Also label the melting point curve, the boiling point curve, and the solid, liquid, and gas regions.
An aqueous solution is 22.0% by mass ethanol, CH3CH2OH, and has a density of 0.966 g/mL. what is molality of ethanol
Identify what complementary functional group would need to be present in the neuraminidase active site for (a) hydrogen bonding and (b) ioic interactions to oseltamivir to be observed?
Write a balanced equation for the reduction of ethyl acetoacetate to S(+) ethyl 3-hydroxybutanoate, show stereochemistry
Describe why barium must be disposed of properly. What are the health effects of excess barium in drinking water? What is the maximum allowable concentration of barium in public water systems?
concentration was dissolved in HCl and diluted to 100.0 mL. Aliquots of 10.00 mL of this unknown solution were added to different volumes of a 2.08 ÃŽ¼g/mL Ca standard solution and diluted to 200.0 mL. Find the weight percent of Ca in the rock sam..
What must be the initial temperature of 22g of steam that is mixed with 90g of water at 68 degree celcius in an adiabatic calorimeter with a heat capacity of zero and that produces
The Standardized solution of NaOH is used to titrate a solution of HCI. Write the balanced equation for this reaction. Calculate the molarity of the HCl solution.
A researcher studying the nutritional value of a new candy places a 4.20-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.71 °C
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