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The first ionization energy of magnesium isgreater than the first ionization energy of calcium. Explain. The first ionization energy of nitrogen is lower than the first ionization energy of oxygen. Explain.
What happens if student forgets to rinse the buret with a small portion of EDTA solution. (Buret contains water droplets from washing.) If this incorrect concentration of EDTAis used to calculate the ppm CaCO3
although they were formerly called the inert gases at least the heavier elements of group 8 do form relatively stable
a mixture of 7.50 g he and 29.5 g ne has a pressure of 750. mm hg. what is the partial pressure of each of the
PVA suspension (by weight) with 15 mL of a 3.00 % borax solution (by weight). What is the weight percent of water in the resulting gel?
An electron in the n = 7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 93.1 nm. What is the value of n for the level to which the electron relaxed
solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. Write a balanced chemical equation for this reaction.
Describe the procedure for conducting a melting point experiment. Include the names of the equipment used and the observations you could expect to make.
Hydrogen atoms that are bonded to an sp3 hybridized carbon atom normally appear between 0.9 & 1.8 ppm and are said to be shielded
consider the equation aaq 2baq 3caq 2daq. in one experiment 45.0 ml of 0.050 m a is mixed with 25.0 ml 0.100 m b. at
The excess EDTA from this reaction required 19.77 mL of 0.01883 M Pb2+ standard solution to reach an end point. Calculate [Cu2+] in the unknown
The heat of vaporization of CCl2F2 is 289 J/g. What mass of this substance must evaporate to freeze 165 g of water initially at 15°C? (The heat of fusion of water is 334 J/g; the specific heat of water is 4.18 J/g-K.)
Acid Mixture Problem, From a full 50-liter container of a 40% concentration of acid, x liters is removed and replaced with a 100% acid.
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