Get college assignment help at uniessay writers A mixture of 8.0 of and 4.0 of is placed in a sealed evacuated container made of a perfect insulating material at 26. The mixture is ignited with a spark and it reacts to form liquid water. what is the final temperature of water?
Balance the following oxidation-reduction reactions, which occur in acidic solution, using the half-reaction method. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.) Pb(s) PbO2(s) H2SO4(aq) → PbSO4(s)
How many moles are in a sample of 8.4×10^15 molecules of NO?
Balance the equation ?CS2 ?O2 →?CO2 ? SO2 , using the smallest possible integers. The co- efficient of O2 is 1. 4. 2. 2. 3. 3. 4. 1. 5. 5.
Nitrogen dioxide (NO2) is a serious air pol- lutant that is formed when fuels are burned in air. Some of the NO2 reacts with water in the air as shown below to form nitric acid (HNO3), a major contributor to acid rain. Suppose that 4.2 tons of NO2 are released into the atmosphere, and that 100% of this NO2 reacts as shown. 3NO2 H2O → 2HNO3 NO How much atmospheric HNO3 would be formed in this way? Answer in units of tons.
a 100 L flask contains a mixture of methane, CH4, and argon at 25C. the mass of argon present is 228 g and the mole fraction of methane in the mixture is .65. calculate the total kinetic energy of the gaseous mixture
5.325 grams of methyl benzoate contains 3.758 grams of carbon, .316 grams of hydrogen, 1.251 grams of oxygen what is the empirical formula? if molar mass is about 130 grams/ mole, what is the molecular formula?
Cyclohexane (C6H12) burns in air to produce carbon dioxide and liquid water. Calculate the heat released (in kilojoules) per gram of the compound reacted with oxygen. The standard enthalpy of formation of cyclohexane is -156.4 kJ/mol
an unknown hydrocarbon is burned in the presence of oxygen in order to determine its empirical formula.Another sample of the hydrocarbon is subjected to colligative property tests in ordet to determine its molecular mass. a)calculate the empirical formula of the hydrocarbon,if upon combustion at STP,9.01 grams of liquid H2O and 11.2 liters of CO2 gas are produced. b)determine the mass of the oxygen gas that is used
2 AlCl3(s) If you begin with 2.70 g of Al and 4.05 g of Cl2, (a) Which reactant is limiting? (b) What mass of AlCl3 can be produced? (c) What mass of the excess reactant remains when the reaction is completed?
Get college assignment help at uniessay writers A system absorbs 218 of heat and the surroundings do 120 of work on the system. What is the change in internal energy of the system?
for the reaction mg 2hcl = h2 mgcl2, calculate the percent yield of magnesium chloride if 100. grams of magnesium react with excess hydrochloric acid to yield 330 grams of magnesium chloride.
What is the pH of a buffer that consists of 0.45 M CH3COOH and 0.35 M CH3COONa? Ka = 1.8 × 10-5
What is the electron geometry of Cl2CO? a. T-shaped b. trigonal pyramidal c. linear d. trigonal planar e. tetrahedral
A gas expands and does P-V work on the surroundings equal to 349 J. At the same time, it absorbs 157 J of heat from the surroundings. Calculate the change in energy of the gas.
a sample of neon is collected at 2.7 atm and 12. 0c . it has a volume of 2.25 L. what would be the volume of this gas at 0.00 0c and 760 mmHg
What is the osmotic pressure of a 0.050M solution of AlCl3 in water that is at 0.00 °C? Note, AlCl3 is a strong electrolyte.
a gas expands and does P-V work on the surrondings equal to 325J. At the same time it absorbs 127J of heat from the surrondings. calculate the change in energy of the gas.
A metal weighing 50g, has a specific heat capacity of .274 J/g*K. What is its molar mass?
The recommended adult does of Elixophyllin, a drug used to treat asthma, is 6.0mg/kg of body mass. Calulate the dose in milligrams for a 115 pound person. (1 pound equals 453.59 grams). I know the answer is 313, I just want to know how to do it.
A standard men’s basketball has a circumference of 29.5 inches. If i fill the ball with helium to the recommended 9 psi at room temperature (25 C) how many grams will the air in the ball weigh? show all work
The post A mixture of 8.0 of and 4.0 of is placed in appeared first on uniessay writers.