Physical Chemistry Answers

The volume of a gas-filled balloon is 30.0 L at 40 °C and 153 kPa pressure. What volume will the balloon have at standard temperature and pressure
(273 K and 101.3 kPa)? Round to the nearest tenth. Don't forget the units.

Calculate q, w, delta E and delta H for the process in which 2.0 moles of N2O gas are cooled from 165 degrees Celsius to 55 degrees Celsius at a constant pressure of 5 atm.

Balanced equation 2NaOH (aq) + CO2 (g) --> Na2CO3 (aq) + H2O (l)
Calculate the number of grams of carbon dioxide that can be absorbed by complete reaction with a solution that contains 5.00 g of sodium hydroxide.

what is the van't hoff factor of Cr2(SO4)3

A physician has ordered 0.64 of atropine, intramuscularly. If atropine were available as 0.10 of solution, how many milliliters would you need to give?

The mineral hydromagnesite is a hydrated carbonate of magnesium, with the formula Mgx(CO3)y(OH)z.nH2O and a molar mass of 466.0 g/mol. When 1.000g of a pure hydromagnesite is heated to constant mass, solid MgO was obtained. Steam was given off, together with 0.378 g of carbon dioxide. The MgO obtained was then completely dissolved in 50 cm3 of 1.0 mol/dm3 HCl. The resultant solution was transferred into a volumetric flask and diluted to 250 cm3 with deionized water. A 25.0 cm3 aliquot of this solution required 19.00 cm3 of 0.15 mol/dm3 solution of NaOH for complete neutralization.

Calculate the values of x and y.
Hence, or otherwise, deduce the values of z and n.
Write a balanced equation, including state symbols the thermal decomposition of a pure sample of hydromagnesite.

U3O8 is a catalyst, prepared by heating a uranium nitrate salt, UO2(NO3)2. This salt decomposes quantitatively to give U3O8, NO2 and O2 only. How many moles of O2 are produced from 1 mole of the salt?

1/3
1/2
2/3
2

the ionization energy of hydrogen atom is 13.6 eV. The kinetic energy of the electron in hydrogen atom is a) 13.6 ev B0 31.6 eV C) 6.8 eV D0 21.7 eV

How many grams of berylium chloride are needed to make 125 mL of a .050 M solution? And how do I get the answer?