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At constant external pressure (1.2atm), the temperature of 3.25 mol of ideal gas increased from 250K to 305K.
Calculate the internal energy change ΔE.
empirical formula for 2.80 g nitrogen and 8.00 g oxygen. what is the molecular formula empirical formula of NH2Cl, molar mass = 51.5 g/mol
Calculate the concentration of iron (II) chloride contaminant in the original groundwater sample. Round your answer to significant digits.
when 50.0 gram of metal at 75.0 C is added to 100 grams of water at 15.0 C the temperature of the water rises to 18.3 C. Assume that no heat is lost to the surroundings. What is the specific heat of this metal
How many grams of dry NH4Cl need to be added to 1.50 L of a 0.300 M solution of ammonia, NH3, to prepare a buffer solution that has a ph of 8.73? pkb for ammonia is 1.8X10^-5.
The element gallium has two naturally occurring isotopes with masses of 68.9300 amu and 70.9200 amu. What would be the fractional abundance of the first isotope, if the atomic weight was 69.6518 amu
How many grams of N2 are required to react with 2.30 moles of Mg in the following process?
Calculate the mass of nitrogen dissolved at room temperature in an 99.0 mL home aquarium. Assume a total pressure of 1.0 atm and a mole fraction for nitrogen of 0.78.
Calculate the work (in kJ) when 2.60 moles of hydrogen gas are produced from the reaction of sodium in excess water at 298 K: 2Na(s) + 2H2O(l) ? 2NaOH(aq) + H2(g)
If you a litre (1000mL) bottle of oil in your engine, how much heat is produced in kcal?In BTU To solve this problem you must know the density of motor oil is .82 g/mL.
Calculate the mass fraction of sulfuric acid in the product solution. b.) Taking 100 kg of the 20% feed solution as a basis, draw and label a flowchart of this process, labeling both masses and volumes, and do the degree-of-freedom analysis. Calcu..
The activation energy for the isomerization of methyl isonitrile (see figure below) is 160 kJ/mol. Calculate the fraction of methyl isonitrile molecules that has an energy of 160.0 kJ or greater at 499 K.
A chemist dissolves 0.9 g of an unknown monoprotic (one acidic H) acid in water. She finds that 14.6 mL of 0.426 M NaOH are required to neutralize the acid.
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