In: Chemistry
Why are aryl and vinyl beta eliminations rare.
In: Chemistry
A 14.585 g sample of CaCl2 was added to 12.283 g of K2CO3 and mixed in water. A 3.573 g yield of CaCO3 was obtained.
(1) What is the limiting reagent?
(2) Calculate the percent yield of CaCO3.
In: Chemistry
What spin functions are allowed for the inner pair of electrons (1s2) in the 1s22s configuration of Li? What spin functions are allowed for the outer electron (2s) in the same configuration?
In: Chemistry
In HNMR,
- What are non-equivalent hydrogens
- What are the "# of Hydrogens per Peak"
- What is coupling and chemical shifts?
In: Chemistry
find the radius of each stable isotope
lead- 204
lead-206
lead-207
lead-208
using the nuclear theory the average radius of a nucleus is given by
R=1.2x10^-13 A^1/3 cm
B) what is the natural % abundance for each isotope above
C) what are the weighted R(cm)
D) what is the total weighted R(cm)
E) what is the weightes average R(cm)
F) relative comparison ration =
In: Chemistry
Explain what characteristics of functional groups make an organic compound lipophilic and what ones make a compound hydrophilic. Explain why these characteristics are lipophilic or hydrophilic.
In: Chemistry
What is a lachrymator?
What are appropriate precautions and safety equipment to use when working with lachrymators?
In: Chemistry
Suppose 5.25 mol of each reactant are used for the following
chemical reactions, identify the limiting reactant. Explain.
____ C6H6 (l) + ____ O2 (s) → _____CO2 (g) + _____ H2O (g)
_____ Al (s) + + ____ Cl2 (s) → _____AlCl3 (s)
____ H2S (g) + ____ O2 (s) → _____SO2 (g) + _____ H2O (l)
In: Chemistry
Organic Chemistry : HNMR QUESTIONS
What is the relationship between the # of scans and the # of signals?
What are limitations to HNMR?
What are "lock signals" in HNMR?
In: Chemistry
A sample of rainwater is observed to have a pH of 7.4. If only atmospheric CO2 at 390 ppm and limestone dust are present in the atmosphere to alter the pH from a neutral value, and if each raindrop has a volume of 0.02 cm3, what mass of calcium (in ng) is present in each raindrop? (Do not make any simplifications.)
Note: the answer is 59 ng. some say 0.02 cm3 rain drop is equal to 0.0134 L, how did that calculation occur?
In: Chemistry
Aqueous sulfuric acid (H2SO4) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium sulfate (Na2SO4) and liquid water (H2O). If 3.37 g of water is produced from the reaction of 13.7 g of sulfuric acid and 20.6 g of sodium hydroxide, calculate the percent yield of water.
In: Chemistry
Predict whether each of the following solvents is miscible or immiscible with water.
ethanol C2H5OH
toluene C7H8
trichloroethylene C2HCl3
acetic acid CH3COOH
Please show work on how to determine miscibility. And determining how it is polar or non-polar.
Thank you
In: Chemistry
1. Some commercial drain cleaners contain a mixture of sodium hydroxide and aluminum powder. When the mixture is poured down a clogged drain, the following reaction occurs: 2NaOH(aq) + 2Al(s) + 6H2O(l) → 2NaAl(OH)4(aq) + 3H2(g) The heat generated in this reaction helps melt away obstructions such as grease, and the hydrogen gas released stirs up the solids clogging the drain. Calculate the volume of H2 formed at 25.5°C and 1.00 atm if 3.75 g of Al is treated with an excess of NaOH.
2. When ammonium nitrite (NH4NO2) is heated, it decomposes to liquid water and nitrogen gas. This property is used to inflate some tennis balls. (a) Write a balanced equation for the reaction. Include phase symbols. NH4NO2(s) → ___ (b) Calculate the quantity (in grams) of NH4NO2 needed to inflate a tennis ball to a volume of 74.59 mL at 1.63 atm and 22°C. Assume the volume of water produced is negligible.
In: Chemistry