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A reasonable pka for a weak base is: 10.3 0.9 5.8 7.4 13.1

Which of the following is a property of metals? a. ductility c. conductivity b. malleability d. all of the above are properties of metals

An 8.5g Ice Cube is placed into 255g water. Calculate temperature change in water upon the complete melting of the ice. (Assume all the energy required to melt the ice comes from the water.)

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What pressure (in atm) will a sample of o2 gas occupy at 100.0 ml, if o2 has a volume of 25.00 ml at 2.0 atm?

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Which state of matter isn't typically found on earth?

Both black and white road surfaces absorb sunlight. the warmer road surface at the end of a sunny day is the

Which information in the periodic table indicates the number of protons in an atom? A. the position of the element in its column B. the element's chemical symbol C. the element's atomic mass D. the element's atomic number

What were the expected results of Rutherford's gold foil experiment, based on Thomson's model of the atom? How did the real results of the gold foil experiment change the accepted model of the atom?