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If 275g of liquid water at 100 degrees C and 475g of water at 30 degrees C are mixed in an insulated container, what is the final temperature?
We were given three ways to make an ammonia/ammonium buffer solution. One way was to add solid NH4Cl to aqueous NH3. This way proved to be the best buffer when HCl or NaOH were added. Why is this. Why does the solid/aqueous buffer work the best.
CH4 and H20 have about the same molecular weights. Which has the higher vapor pressure at room temperature? Explain.
Automobile airbags contain solid sodium azide, NaN3, that reacts to produce nitrogen gas when heated, thus inflating the bag. 2NaN3(s) ------> 2Na(s) + 3N2(g) Calculate the value of w (work) for the following system if 14.7 g of NaN3 reacts comple..
A solution is created by adding 0.05 moles of H2CO3 (3.1 g, total mass) to 5-L of water, resulting in a pH of 4.2. What is the alkalinity of this water (in meq/L)? Does the answer make sense, why or why not
A fully animated PowerPoint presentation explaining the molecular structure of fats, the difference between saturated and unsaturated fats and why bromine can be used to test for fats and how saturated they are.
1. explain why adding an excess of po43- will cause a more complete precipitation of capo42.2. strontium phosphate is
Suppose that in changing samples, a portion of the water in the calorimeter weere lost. In what way, if any, would this change the heat capacity of the calorimeter?
A copper wire (density = 8.96 g/cm3) has a diameter of 0.49 mm. If a sample of this copper wire has a mass of 11 g, how long is the wire in ft?
Metal X was plated from a solution containing cations of X. The passage of 48.25 C deposited 31 mg of X on the cathode. What is the mass of X (in grams) per mole of electrons.
considering the given equation as. cac2s2h2ol c2h2gcaoh2aq nbspin which acetylene gas c2h2 is produced a. determine
Why are Supporting Electrodes (KCl) used? Please explain about around these 3 factors: resistance, potential near electrode
Calculate the mass in grams of calcium bromide the chemist has added to the flask. Round your answer to 3 significant digits.
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