Other Chemistry Answers

Assuming enthalpy of combustion of hydrogen at 273 K, –286 kJ and enthalpy of fusion of ice at the same temperature to be + 6.0 kJ, calculate enthalpy change during formation of 100 g of ice

Definition of electrolysis

if 80 g of X combines with 1.5x10^23 atoms of Y to form X Y2 without any of either element remaining, determine gram atomic weight of X

The reaction between marble chips and hydrochloric acid is given as: CaCO3+2HCl---------->CaCl2+CO2+H2O what will be the effect on the rate of reaction if marble chips are replaced by ground marble?

State Le Chatelier's principle. Predict the direction of the equilibrium if the following constraints are applied:- N2+ O2+ heat <---------------->2NO. * Temperature is increased * Pressure is decreased * More O2 is added * Volume of vessel is increased.

A chemist (using diffusion apparatus) was working on a gas of unknown identity.using diffusion apparatus.He noted that the rate of diffusion of the unknown gas was 70.3cm3/s where asCO2 is 60 cm3/s under similar conditions.What is the molecular mass and identity of unknown gas?

How many cubic centimeters of hydrogen chloride gas at s.t.p would be required to precipitate all the silver ions from 32cm 0.08 mole silver nitrate solution

what will happen if an aluminum spoon is used to stir a solution of Fe(NO3)2? Explain using standard emf

A reacts with B to form a compound AB. When the reaction occurs, 150.0 ml of water was heated from 17.1 degrees C to 19.8 degrees C. Assuming 1 mole of AB formed, calculate the delta H fusion for AB. Leave answer in kcal/mol.

How much energy (in calories) is needed to warm 75.0 grams of water from 14.4 degrees C to 19.2 degrees C?