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A researcher research the nutritional value of a new candy places a 6.30-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature raise is 2.78°C. If the heat capacity of the calorimeter is 32.80 kJ•K-1, explain how many nutritional Calories are there per gram of the candy?
Which of the following is false? A. Molecules with strong intermolecular forces have higher surface tension. B. Molecules with strong intermolecular forces have higher viscosities.
Explain the efffect of temperature on the solubility of gases in liquid? What effect does pressure have on the solubility of gases in liquid( Henry's Law)?
Calculate the pH during the titration of 20.00 mL of 0.1000 M ammonia NH3(aq), with 0.1000 M HCl after 20.30 mL of the acid have been added. Kb of ammonia = 1.8 x 10-5.
There are 3 different possible structures (known as isomers) for a dibromoethene molecule, C2H2Br2. One of them has no net dipole moment, but the other two do. Draw a structure for each isomer. Include H atoms.
Identify the charged groups in the peptide illustrated below at pH 1 and pH 7. Explain what is the net charge of this peptide at these two pH values
Calculate the pH of a buffer solution made by mixing 49 ml of a 0.07 M ammonia solution with 52 ml of a 0.10 M ammonium nitrate solution. Give the pH to two decimal places.
Why are the hydrides of alkali metals are high-melting solids, whereas the hydrides of halogens are gases at room temperature
The pressure is steeply increased to 100 bar. The volume of the liquid is decreased by 1 ml at this constant pressure. Find the deltaH and deltaU
Green light has a wavelength of approximately 645 nm. What is the energy in kJ of 1.00 mole of photon of green light
How many L. of N2 gas are produced at STP when the airbag inflates if the airbag contains 132 g. of Sodium Nitride?
An imine is a special type of amine that has a carbon-nitrogen double bond. Construct an orbital interaction diagram that compares a carbon-nitrogen double bond to a carbon-oxygen double bond on the same energy scale.
A mixture of KBr and NaBr weighing 0.560 gm was treated with aqueous Ag+ and all the bromide ion was recovered as 0.970 gm of pure AgBr. What was the fraction by weight of Kbr in the original sample?
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