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Calculate the atomic mass of gallium if gallium has 2 naturally occurring isotopes with the following masses and natural abundances:   Ga-69       68.9256 amu     60.11% Ga-71       70.9247 amu     39.89%  

Heating pink cobalt (II) chloride hexahydrate (CoCl2.6H2O) produces blue cobalt (II) chloride. This is due to

A school committee is selecting 3 student representatives from a group of 9 students. How many different ways can the committee choose the 3 students?

Which of the following is not a result of experiments performed by JJ Thomson on cathode rays?

A metal cube of mass (m) 6.67 g displaces 1.40 cm3 of water. identify the metal based on its density. (Given: d = mV{“version”:”1.1″,”math”:”mV”})

The water stored in the Hoover dam is used to generate electricity. the energy possessed by water stored in the dam is 

Which of the following is not a part of the experimental procedure you followed to determine the density of a solid using a pycnometer?

We can convert between the temperature scales with the formula K = oC + 273.15.  Express 40 oC in K. 

How should an analysis paper begin according to the guidelines?

 Why is it important to vary sentence structure and length in writing?