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90.0 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.5, what is the mass of the steel bar?
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What is the subshell electron configuration for the Ca20 atom? Which are valence electrons and how many valence electrons are there?
If 14.40 grams of RbCl are dissolved in water to make a solution of 0.224 L, the density is found to be 1.047 g/cm 3 . Calculate the molality of the solute.
C-14 analysis of the Shroud of Turin has shown that approximately 93% of the 14C present in living matter is still present in samples taken from the shroud. Based on this information, what is the approximate age of this ...
What is the mass of NaOH present in grams, given that a 100. mL solution has a concentration of 0.125 M?
As a distributor, Testa Produce doesn't have direct contact with the public. How might the company go about alerting consumers to its "green" initiatives?
At a given pressure and temperature, it takes 198.7 sec for a 2.6 L sample of Kr to effuse through a porous membrane. How long does it take for 2.6 L Ar to effuse under the same conditions?
What is an example of a cell diagram for a voltaic cell? How do I calculate the standard cell potential for the example of the voltaic cell?
A mixture containing 3.3 moles of NO and 0.76 mole ofCO 2 was allowed to react in a flask at a certaintemperature according to the equation. NO (g) + CO 2 (g) ↔ NO2 (g) + CO (g) At equilibrium 0.21 mole of CO 2 was pr ...
Why do the instructions call for using a saturated solution of NaOH rather than one at lower concentration? Why can we ignored in the calculation of the concentration of NaOH?
A sample of cobalt (II) chloride hydrate starts with a mass of 3.35 g. After heating, the sample mass is 1.83 g. What is the molar ratio of water to cobalt chloride? What is the correct chemical formula
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