List of Chemistry sub-categories

Chemistry Recently Posted Questions

Question Subject Tutorials
Compute the energy gap between the excited and ground state
  If you put 120 volts of electricity through a pickle, the pickle will smoke and start glowing an orange-yellow color. The light is emitted because the sodium ions in the pickle become excite …
Chemistry / Biochemistry Get it Now
Explain why is it quantitatively not acceptable to titrate
  Why is it quantitatively not acceptable to titrate each vinegar samples with NaOH titrant to the same dark pink endpoint?   …
Chemistry / Biochemistry Get it Now
Explain size of an axial substituent always result in higher
  Does increasing the size of an axial substituent always result in higher relative strain energies for the axial conformation   …
Chemistry / Biochemistry Get it Now
Explain the pkb values for the dibasic base
  The pKb values for the dibasic base B are pKb1 = 2.1 and pKb2 = 7.8. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.75 M B(aq) with 0.75 M HCl(aq). (b …
Chemistry / Biochemistry Get it Now
Which is the most acceptable electron dot structure
1. Which is the most acceptable electron dot structure for N2H2?   2. How many lone pairs of electrons are on the Xe atom in XeF6? a. 1 b. 2 c. 0 d. 3 3. Which element, indicated b …
Chemistry / General Chemistry Get it Now
Explain a reagent bottle on the shelf labeled
A reagent bottle on the shelf labeled 0.5 M NaCl was used in place of the 0.5 M CaCl2. Assuming C2O42- to be in excess, what would be observed as a result of using this reagent in this test   …
Chemistry / General Chemistry Get it Now
Explain the lewis structure for -ch2cn
The lewis structure for -CH2CN (that should be a superscripted negative sign to the left of the 1st C)   …
Chemistry / General Chemistry Get it Now
Original concentration
How many half lives will it take the c4h6 to decrease to 3.1% of its original concentration? the relationship of At/ A0= 0.50   …
Chemistry / General Chemistry Get it Now
State the organic product of the reaction
Draw the organic product of the following reaction between (1S,3S)-1-chloro-3-methylcyclopentane and methanethiol in the presence of sodium hydroxide. Include stereochemistry Select all that apply: …
Chemistry / General Chemistry Get it Now
Watt light bulb consumes
A typical 100-watt light bulb consumes 100 J of energy per second. If a light bulb converts all of this energy to 400 nm light, how many photons are produced each second? A) 5.0x10-28 B) 5.0x10- …
Chemistry / General Chemistry Get it Now
Compute maximum mass of s8 produced by combining reactant
What is the maximum mass of S8 that can be produced by combining 80.0g of each reactant? 8SO2+16H2S -> 3S8 + 16H2O   …
Chemistry / General Chemistry Get it Now
What is the ph of the benzoic acid solution prior to adding
prepare a pH=4.00 buffer starting from 1.50 L of 0.0200 M solution of benzoic acid (C6H5COOH) and an excess of sodium benzoate (C6H5COONa). 1. What is the pH of the benzoic acid solution prior to addi …
Chemistry / General Chemistry Get it Now
State keq to calculate the scn- concentration
Use the mean value that you determined for Keq to calculate the SCN- concentration in a solution Fe3+ concentration was 4.00 X10-2M and initial SCN- concentration was 1.00 X10-3 M. Is all of theSCN- i …
Chemistry / General Chemistry Get it Now
Explain the molarity of the malonic acid solution
A solution of malonic acid, H2C3H2)4, was standardized by titration with 0.1000 M NaOH solution. If 24.91 mL of the NaOH solution were required to neutralize completely 15.78 mL of the malonic acid so …
Chemistry / General Chemistry Get it Now
Standard enthalpy of formation of isomer
For a particular isomer of C8H18, the following reaction produces 5104.1 kj of heat per mole of C8H18(g) consumed, under standard conditions C8H18(g) + 25/2O2(g) --->8CO2(g) + 9H2O(g) deltaHr …
Chemistry / General Chemistry Get it Now
Find out the molar concentration of the weak acid solution
A 23.74mL volume of 0.0981 M NaOH was used to titrate 25.0mL of a weak monoprotic acid solution to the stoichiometric point. Determine the molar concentration of the weak acid solution.   …
Chemistry / General Chemistry Get it Now
The charges and sizes of the ions in an ionic compound
Problem- The charges and sizes of the ions in an ionic compound affect the strength of the electrostatic attraction holding that compound together. Based on ion charges and relative ion sizes, rank th …
Chemistry / General Chemistry Get it Now
Biphenyl c12h10 is a nonvolatile nonionizing solute
  Biphenyl C12H10 is a nonvolatile nonionizing solute that is soluble in benzene C6H6. At 25 °C the vapor pressure of pure benzene is 100.84 torr. Explain what is the vapor pressure of a s …
Chemistry / Biochemistry Get it Now
Calculate the ph of each of the following strong acid
The answer to Acid-Base Equilibria Hey there. I am having trouble with this question. Calculate the pH of each of the following strong acid solutions: a) 0.00135 M (mol/L) HNO3 b) 0.425 g of H …
Chemistry / General Chemistry Get it Now
Determine the value of k the thermodynamic equilibrium
The following equation represents the decomposition of a generic diatomic element in its standard state. 1/2 X2(g) ---> X(g) Assume that the standard molar Gibbs energy of formation of X(g) i …
Chemistry / General Chemistry Get it Now
Whatsapp Lisa