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Which one of the following pairs of gases contains the same number of molecules (a) 16 g of O2 and 14 g of N2 (b) 8 g of O2 and 22 g of CO2 (c) 28 g of N2 and 22 g of CO2 (d) 32 g of O2 and 32 g of N2
Liquid nitrogen has a density of 0.808g/ml at 77 K. A sample of 2.5 L of liquid nitrogen is allowed to evaporate at 21°C and 1.00 atm of pressure. what volume will the nitrogen gas occupy?(keep your phases straight)
If you used 0.165mL of acetic anhydride, and 0.167g of p-aminophenol what was your theoretical yield of acetaminophen. b) If you recovered 0.187g of acetaminophen, what was your percent yield
Solid benzoic acid, C6H5COOH(s), is often used to determine the heat capacity of a bomb calorimeter, because the constant volume heat of combustion of this compound is known with high precision
When 0.231g of phosphorus reacts with chlorine to form phosphorus trichloride, in a coffee cup calorimeter of heat capacity 216J/degreeC, the temperature of the calorimeter rises by 11.06C
Describe the bond angles to be found in each of the following molecular structures: (a) Planar trigonal (b)tetrahedral (c) octahedral (d) linear
Determine the concentrations of K2SO4, K , and SO42- in a solution prepared by dissolving 2.11 × 10-4 g K2SO4 in 2.00 L of water. Express all three concentrations in molarity.
According to the following reaction, how many grams of tetraphosphorus decaoxide are required for the complete reaction of 29.9 grams of perchloric acid (HClO4). perchloric acid (HClO4) (aq) + tetraphosphorus decaoxide (s) phosphoric acid (aq) + d..
Write the element symbol and charge. How many unpaired electrons are there in the ground state of this ion
Calculate the expansion work done against a constant external pressure of 0.991 atm and at a constant temperature of 18°C. Assume that the initial volume of dry ice is negligible and that CO2 behaves like an ideal gas.
determine the volume of a cube 10,62 cm, give an example of four sets of measurements that illustrate an imprecise and inaccurate data
how many grams of H2 are needed to react with an excess of N2 and produce 6,867 grams of NH3? the molar mass H2 is 2.016g and the molar mass NH3 is 17.04g
Describe the role of the citric acid cycle as a central metabolic mechanism. Explain what happens to the cells' abilities to oxidize acetyl CoA when intermediates of the cycle are drained off for amino acid biosynthesis.
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