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A. A student places 2.10 L of water in his dormitory room, which has the volume of 4.06 x10^4 L. He seals the room and waits for the water to evaporate. At 25 deg C, the density of water is 0.997 g/mL, and is vapor pressure is 23.8 mmHg. will all the water evaporate at 25 deg C? assume the intial humidity in the room is 0&. (hint: how much water must evaporate in order to exert a pressure of 23.8 mmHg in a volume of 4.06 x10^4 L at 25 deg C) B. How much water will remain in liquid form, if any?
Following a terrorist release of Cesium-137 (half-life of 30 years) in downtown, clean up efforts were successful in removing all but 100 curies. How long will it take for the contamination to decay to about 5 curies?
What is the pH when 100 mL of 0.1 M NH3 is titrated with 50 mL of 0.2 M HCl? pKa of NH4Br is 9.25.
What volume of O2 at 684 mmHg and 21 degree celsius is required to synthesize 25.0 mole of NO?
Given the reaction: Ca + 2H2O -> CA(OH)2 +H2 What is the total number of moles of Ca needed to react completely with 4.0 moles of H2O?
2 NO(g) + O2(g) 2 NO2(g) In one experiment 0.633 mole of NO is mixed with 0.354 mole of O2. Calculate also the number of moles of NO2 produced.
Given the following thermochemical equations, C2H2(g) + 5/2 O2(g) -----> 2CO2(g) + H2O(l) enthalpy = -1299.5 kJ
what is the molar mass of glucose if 22.5g gives a freezing point of -0.930 C when dissolved in 250 g of water?
The vapor pressure of water is 28.3 torr at 29°C then determine what is the partial pressure of oxygen collected if a reaction at that temperature produces Carbon Dioxide which is collected over water at a total pressure of 576 torr, ?
If 20.8 mL of NO2 gas is completely converted to N2O4 gas under the same conditions, what volume will the N2O4 occupy?
The accompanying drawing shows 4 water molecules interacting with glycine. Four dotted lines are labeled with numbers 1 through 4. As labeled by these numbers, which of the dotted lines could represent hydrogen bonds?
Periodicity in the ionization energy and balancing the equation - Complete the following chemical reactions by writing the product(s) and balancing the equations:
A sample of sodium reacts completely with 0.426 kg of chlorine, forming 702 g of sodium chloride. What mass of sodium reacted?
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