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Which of the following statements are evidence that gases do not always behave ideally? -At 4 K and 1 atm, helium is a liquid. -When two gases are mixed, they follow Dalton\'s law of partial pressures. -It is impossible to compress a gas enough so that it takes up no volume. -CO2 gas becomes dry ice (solid CO2) at 1 atm and -78.5 °C.
Gallium consists of two isotopes of masses 68.95 amu and 70.95 amu with abundances of 60.16% and 39.84%.
A hiker caught in a thunderstorm loses heat when her clothing becomes wet. She is packing emergency rations that, if completely metabolized, will release 30 kJ of heat per gram of rations consumed.
How many grams of F2 are needed to produce 120. g of PF3 if the reaction has a 78.1% yield?
Give the number of valence electrons of each element and draw the Lewis structure for each molecule.
Each student recorded the temperature change and calculated the enthalpy of neutralization. Two of the chemists will report, within experimental error, the same temperature change for the HCl/NaOH reaction. Identify the two students and explain
determine the ph of the following solutions, showing calculations.
What is the final pressure (atm) of a 3.05 L system initially at 724 mm Hg and 298 K, that is compressed to a final volume of 3.00 L at 273 K
What is the total pressure of a gaseous mixyure that contains 3 gases with a partial pressure of 1.2atm oxygen, 0.35 atm carbon dioxide
What is the product in the reaction between the aldehyde portion of a glucose molecule and the c-5 hydroxyl group? The possible answers
Write the net ionic equation for the neutralization of the bases, magnesium hydroxide, Mg(OH)2 and aluminum hydroxide, Al(OH)3, found in Maalox, for example, with acid (H+).
Briefly describe the adverse effects caused by exposure to radiation. Include some specific exposure levels associated with these significant health effects.
Calculate the mass of the reaction mixture in the calorimeter. (To do this, assume that the density of the HCl solution originally in the calorimeter can be approximated with the density of water (1.0 g/mL).
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