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A sample of H2 id collected by displacing 145mL of water. The pressure of gas and the atmosphere equalized. The atmospheric pressure is 745 mmHg. THe temperature of water and theatof the gas are identical at 26 degress C. The vapor pressure of water at 26 degrees C is 25.209 mmHg. How many moles of gas were collected?
What mass of water can be heated from 22?C to 100 ? C by burning this piece of coal? Answer in units of g
Draw the Lewis Structure and make a rough three-dimensional sketch of each species.
Ammonia can be oxidized in oxygen as shown: 4 NH3(g) + 3 O2(g) 2 N2(g) + 6 H2O(g). When 0.791 mol of NH3 and 0.814 mol of O2 are placed in a 1.00 L container at a certain temperature,
Solubility of calcite (CaCO3) will increase with a decrease in temperature and decrease with an increase in temperature. This is because the solubility of calcite is dependent on the solubility of CO2.
A certain constant-pressure reaction is nonspontaneous at 45oC. The entropy change for the reaction is +72 J/K. What can you conclude about the sign and magnitude of the enthalpy
A 295mLflask contains pure helium at a pressure of 742torr . A second flask with a volume of 465mL contains pure argon at a pressure of 717torr .
To what volume must 558 mL of 13 M Ca(OH)2 solution be diluted to make a 3 M Ca(OH)2 solution?
In a solution of acetone and ethanol, the mole fraction of acetone is 0.40. What is the concentration of acetone as a mass percent?
When 1 mole of H2(g) reacts with C2H4(g) to form C2H6(g) according to the following equation, 137 kJ of energy are evolved. What is the value of q?
a steel tank with a volume of 9.583L contains N2 gas under a pressure of 4.972 atm at 31.8C Calculate the number of moles of N2 in the tank.
Write the complete stepwise mechanisms for reactions below. Show all intermediate structures and all electron flow with arrows.
What is the theoretical yield of chromium that can be produced by the reaction of 40.0 g of Cr2O3 with 8.00 g of aluminum according to the following equation?
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