| Question | Subject | Tutorials |
|---|---|---|
| Explain what is the caloric content of sucrose in cal/g Palmitic acid C_16 H_32 O_2 is a dietary fat found in beef and butter. The caloric content of palmitic acid is typical of fats in general.
1. What is the caloric content of sucrose in Cal/g? Delta … |
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| During a breath the average human lung expands by about 050 During a breath, the average human lung expands by about 0.50 (L). How much work (in {rm J}) is done during the expansion If this expansion occurs against an external pressure of 1.0 atm,?
Consider … |
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| Double bond look identical A. In Lewis theory, the two bonds in a double bond look identical. However, valence bond theory shows that they are not.
1. Describe a double bond according to valence bond theory.
2. Explain wh … |
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| Explain the color change at the endpoint should persist The color change at the endpoint should persist for 30 seconds. Why is this time lapse a good titration technique?
… |
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| A gaseous sample of the element is bombarded by photons A gaseous sample of this element is bombarded by photons of various energies (in these same units). Match each photon to the result of its absorption (or lack thereof) by an n=1 electron.
Photon En … |
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| Explain synthetic route from ethylbenzene
Construct a multistep synthetic route from ethylbenzene to (2-bromoethyl)benzene (3 reagants used)
… |
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| State the Lewis Dot Structure of Hxesh the Formal Charges what is the lewis dot structure of HXeSH the formal charges on each atom should be = to 0
… |
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| Draw the structures of two stereoisomeric alkenes that Draw the structures of two stereoisomeric alkenes that would give 3-hexanol as the only major product of hydroboration followed by treatment with alkaline H2O2:
… |
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| What is the standard enthalpy of formation Question- For a particular isomer of C8H18, the following reaction produces 5093.7 kJ of heat per mole of C8H18(g) consumed, under standard conditions.
What is the standard enthalpy of formation of … |
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| Explain what is the pressure of the air in the basketball
a basketball is inflated to 9.0 psi (pounds per inch) above atmosphere pressure of 14.7 psi ( a total pressure of 23.7 psi). The diameter of the basketball is 10 inches. What is the pressure … |
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| Define phosphate systems form essential buffers in organisms
Phosphate systems form essential buffers in organisms. Calculate the pH of a buffer made by dissolving 0.80mol of NaOH in 0.50L of 1.0M H3PO4.
… |
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| Draw a structure containing only carbon and hydrogen Question: Draw a structure containing only carbon and hydrogen that is a chiral alkyne with six carbon atoms. (Wedge/dash bonds are omitted for simplicity.)
… |
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| Calculate the mass percent composition of nitrogen CHEMISTRY CHAPTER 3
Exercise 3.28: Problems by Topic - Chemical Formulas and Molecular View of Elements and Compounds
Part A
Which of the following elements have molecules as their basic units? … |
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| Explain what is the molarity of the malonic acid solution
1. State the balanced chemical equation for the reactionof KHP with NaOH.
2. Explain how many grams of NaOH are needed to prepare250mL of 0.205M NaOH?
3. A solution of malonic acid, H2 … |
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| Complete the subsequent reaction sequence by drawing Complete the subsequent reaction sequence by drawing in the neutral reagents and products where necessary. The product of this reaction has a molecular formula of C7H6O2 as well as has a 1H NMR spectr … |
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| Derivative be a necessary step in this experiment
When would formation of a derivative be a necessary step in this experiment?
… |
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| Explain perchloric acid (hclo4) tetraphosphorus decaoxide
According to the following reaction, how many grams of tetraphosphorus decaoxide are required for the complete reaction of 29.9 grams of perchloric acid (HClO4)? perchloric acid (HClO4) (aq) … |
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| A student purified a 500-mg sample of phthalic acid by
A student purified a 500-mg sample of phthalic acid by recrystallization from water. The published solubility of phthalic acid in 100mL of water is 0.54 g at 14C and 18 g at 99C. The smalles … |
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| Explain how sulfuric acid can convert 4-methylcyclohexene
Give equations to show how sulfuric acid can convert 4-methylcyclohexene into a mixture of four isomeric C7H12 compounds (include starting material). Predict the relative amounts of each iso … |
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| State Minimum Frequency of Light Is Required to Ionize Boron The energy required to ionize boron is 801 kJ/mol. What minimum frequency of light is required to ionize boron?
… |
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