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A lead (Pb) pellet having a mass of 26.47 g at 89.98ºC was placed in a constant-pressure calorimeter of negligible heat capacity containing 100.0 mL of water. The water temperature rose from 22.50ºC to 23.17ºC. What is the specific heat of the lead pellet? (The specific heat of water is 4.184 J/gºC, and the density of water is 1.00 g/mL.)
Statements correctly describe(s) the relationship between the structure of a fatty acid and its melting point? a. Saturated fatty acids have melting points that increase gradually with molecular weight.
Why does sulfuric acid protonate the nitrogen atom of the diethylamine group of lidocaine preferentially to that of the amido group
A sample of 0.255 mole of gas has a volume of 748 mL at 28°C. Calculate the pressure of this gas. (R= 0.0821 L · K)
When 3.00 mol of benzene is vaporized at a constant pressure of 1.00 atm and at its normal boiling point of 80.1 degreesC, 101.8 kJ are absorbed and the P(delta)V for the vaporization process is equal to 8.70 kJ then
A solution is made by mixing 4.6 mL of 0.274 M Fe(NO3)3 and 656.0 mL of water. What is the concentration of Fe3+ in the resulting solution?
What is the minimum amount of energy from the sun required to produce 5 g of glucose in this way? ?Hf of glucose is -1260 kJ/mol.
Explain why alcohols such as ethanol and propanol are soluble in water, butanol is moderately soluble and pentanol is slightly soluble
Calculate the Mn of the polyisobutene if A 7.5g polymer sample found to discolor 3.4 mL of a 0.05 M solution of Br in CCl4 ?
A buffer solution containing 0.25 M Acetic acid and 0.56 m Sodium acetate. After addition of 0.0060 mol HCL what is Ph of buffer.
Calculate the theoretical and percent yields, b: 20.0g of NaHCO3 is heated to form Na2CO3. Calculate the theoretical loss in weight on heating
The combustion of an organic compound releases 35.6 kJ of energy and causes the temperature of a constant volume calorimeter to increase by 4.76 °C .
when it dissolves in water (3 moles of ions/mole of salt). Calculate the freezing point of a solution containing 18.8g of Na2SO4 in 465g of water. The Kf for water is 1.86C kg mol-1.
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