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-When 3.0 kg of water is warmed from 10 °C to 80 °C, how much heat energy is needed? The specific heat capacity of water is 4.186 joule/gram °C Show your work
-A calorimeter contains 100 g of water at 39.8 ºC. A 8.23 g object at 50 ºC is placed inside the calorimeter. When equilibrium has been reached, the new temperature of the water and metal object is 40 ºC. What type of metal is the object made from?
Question- In which of the following do you expect the percent ionization of 1 mol of NH4Cl to be greatest in 500mL water, 1000mL of water or 1000mL of a 0.10 M NH3 solution. Explain.
Magnesium phosphate precipitates from an aqueous solution. Does the entropy of the system increase or decrease
After all his studying, he was confident that he could calculate the number of fluoride ions. Can you?
Which of the following pairs of aqueous solutions will react when mixed?
What is the theoretical yield in grams if 120. g of Ca reacts with 21.0 g of N 2
how many moles of glucose, C6H12O6 can be burned when 60.0 mol of O2 is available?
Organic chemists rely heavily on the spectroscopic methods of IR and NMR. Explain in great detail (that means more than 2 or 3 sentences) why the two methods have to be used in tandem to determine
The Ka of a monoprotic weak acid is 6.08 × 10-3. What is the percent ionization of a 0.187 M solution of this acid
After the dry H2(g) is collected in a 100 mL bulb at 25° C, the new pressure is 67.0 kPa. What is the vapor pressure of H2O, in kPa, at 25° C?
calculate the unknown concentration for the analyte noted as (xM) from the potential data given at 25 oC Pt/Fe 2+ (0.05 M)//Ag+ (xM) /Ag.
Sketch the phase diagram of the system NH3/N2H4 given that the two substances do not form a compound with each other, that NH3 freezes at -78°C and N2H4 freezes at +2°C, and that a eutectic is formed when the mole fraction of NH is 0.07 and that t..
Describe the development of the modern periodic table. Include contributions made by Lavoisier, Newlands, Mendeleev, and Moseley.
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