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Hydrazine is used as a rocket fuel. when 1.5 g of hydrazine N2H4, was burned in a bomb calorimeter, temp increased from 23.57 degrees celcius to 28.84 degrees celcius. The heat capacity of the calorimeter was 5.510 kJ/degree celcius. Determine the enthalpy of combustion of hydrazine.
The observed rotation of a solution of 1.3 g of a compound in 10 mL of water is +3.7 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound
with wet beriberi, peripheral vessels dilate and cardiac muscle looses its contractility. also, alpha-ketoglutarate is found in high concentrations. this is thought to be caused by
Nitrogen forms several gaseous oxides. One of them has a density of 0.869 g L-1 measured at 764 mmHg and 150°C. Write the formula of the compound
why does a salt containing a cation from a weak base and an anion from a strong acid form an acidic solution
what is the mole fraction and b) what is the molality of this compound in the solution? the molar mass of the unknown compound is 45.0 g/mol
sulfuric acid acts as a catalyst for making esters. Write an equation showing the production of Isoamyl alcohol
Benzoic acid, C6H5COOH, is sometimes used to for the standardization of solutions of bases. A 1.722 g sample of benzoic acid reacts with 26.47 mL of a NaOH solution. What is the molarity of the base solution
what is the molarity of a solution that contains 5.2g urea (molecular weight = 60 amu) in 250g of benzene?
Calculate the max wavelength of light (in nm) required to ionize a single lithium atom, knowing that the ionization energy of lithium is 520 kJ/mol
hcl acid solution is standardized using 0.502g of sodium carbonate. find the molarity of the acid if 30.5ml are
understanding of chemistry basics.1. the relative concentrations of reactant and product found when a reaction reaches
When 0.170 g of the hydrate CaCl2•xH2O is heated, 0.128 grams of anhydrous CaCl2 remains. What is the value of x in the formula for the hydrate?
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