Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- A sample of 263.0 mL of wet nitrogen gas was collected over water at a total pressure of 756 torr and a temperature of 21.0 °C. (The vapor pressure of water at 21.0 °C is 18.7 torr.) The nitrogen was produced by the reaction of sulfamic acid, HNH,SO3, with 368.5 mL of a solution of sodium nitrite according to the following equation. NaNO2 + HNH2SO3- N2 + NaHSO4 + H2O Calculate what must have been the molar concentration of the sodium nitrite. Marrow_forward1. A 3.19-g mixture of solid CaO and solid ZnO is reacted in a 2.00-L container with CO2(g) at a pressure of 680 Torr at 25 °C to form the corresponding (solid)metal carbonates. The final pressure after the reaction is 260 Torr. What was the mass percent of CaO in the original mixture?arrow_forwardA 10.0 L vessel at 298 K contains O2(g) at a pressure of 740. mmHg. What mass of He(g) would be added to increase the total pressure to 1480. mmHg?arrow_forward
- A sample of an ideal gas at 1.00 atm1.00 atm and a volume of 1.07 L1.07 L was placed in a weighted balloon and dropped into the ocean. As the sample descended, the water pressure compressed the balloon and reduced its volume. When the pressure had increased to 15.0 atm,15.0 atm, what was the volume of the sample? Assume that the temperature was held constant.arrow_forwardA sample of magnesium metal reacts completely with an excess of hydrocholoric: Mg(s) + 2 HCl(aq) -- > MgCl2(aq) + H2(g) The hydrogen gas produced is collected over water at 28.0 °C. The volume of the gas is 18 L, and the total pressure in the gas collection vessel is 1.06 atm. Calculate the mass of magnesium metal that reacted in grams. (Vapor pressure of water at 28.0 °C = 28.2 mmHg) Just give the number. The assumption is the value is in grams.arrow_forwardA flask of volume 0.753 L contains a sample of chlorine gas, Cl2, with a pressure of 198 Torr at 25.8 degrees C What mass of sodium, in grams, is required to completely react with the chlorine to make sodium chloride? 2 Na (s) + Cl (g) - - > 2 Na C1 (s)arrow_forward
- The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes with the propane (C3H8) to burn it completely. For every gram of propane that flows through the burner, what volume of air is needed to burn it completely? Assume that the temperature of the burner is 205.0°C, the pressure is 1.05 atm, and the mole fraction of O2 in air is 0.210.arrow_forward73. A 500.-mL sample of O2 gas at 24 °C was prepared by decomposing a 3% aqueous solution of hydrogen peroxide, H2 O2, in the presence of a small amount of manganese catalyst by the reaction 2H2 O2 (aq) → 2H2O (g) + The oxygen thus prepared was collected by displacement of water. The total pressure of gas collected was 755 mm Hg. What is the partial pressure of O2 in the mixture? How many moles of O2 are in the mixture? (The vapor pressure of water at 24 °C is 23 mm Hg.)arrow_forwardAn ideal gas is contained in a cylinder with a volume of 4.8 × 10² mL at a temperature of 30.°C and a pressure of 710. torr. The gas is then compressed to a volume of 26 mL, and the temperature is raised to 820.°C. What is the new pressure of the gas? Pressure = torrarrow_forward
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