Other Chemistry Answers

explain origin of peaks at m/z=114, 85, 71, 57 in mass spectrum of 2butanol

When magnesium combines with sulfur to form magnesium sulfide, it is oxidized to Mg2+. Which statement is true about this reaction?

How can you tell by observation if a substance has a high or low heat capacity?

Thermodynamics: calorimetry variations on Q=sm∆T
20.0 g of ice at 0.00 degrees Celsius is mixed with 60 g of water at 75.0 degrees Celsius. What's the final temperature of this mixture, assuming that no heat is lost to the environment.? (Hf-water= 334 j/gram)

Thermodynamics: calorimetry variations on Q=sm∆T
A 12.0 g sample of sodium hydroxide is dissolved in 15.0 g of water in a styrofoam cups and the temperature of the water rises from 23.0 degrees Celsius to 33.2 degrees Celsius. Use this data to calculate the heat of solution of lithium chloride in kj/mol.

Thermodynamics: calorimetry, variations on Q=sm∆T
A sample of lead is heated to a temperature of 155 degrees Celsius and dropped into 175 g of 25.0 degrees Celsius water. If the temperature of the water rises to 54.5 degrees Celsius, what's the mass of the lead sample?

A mixture of 60 gm N2 and 60 gm of O2 has a total pressure is 2.5 atm. What are the Partiall pressure of N2 and O2 in the Mixture?

Describe the methods used for collecting gaseous sample for environmental analysis

what species has the electron configuration [Ar]3d^4?
Mn2+?
Cr2+?
v3+?
Fe3+?
k+?

Transition metals have a number of properties where they differ from other metals in the periodic table. Discuss these differences in terms of high densities, high melting and boiling points, ionisation energies, variable oxidation states and complex formation.