Chemistry Questions

1. The element with the electron configuration 1s2 2s2 2p6 3s2 is: a. carbon b. magnesium c. silicon d. sodium e.neon 2. Which of the following compounds would be classified as having covalent bonding but exhibiting a dipole? a. Kbr b.F2 c. C2H2 d. CH3CL 3. In the reaction shown below, which of the species is the ...continues

Chemistry Questions

3. The number of equivalent resonance structures that can be drawn for HCO2 -1 is 4. Which of the following is closest to the pH of 10-4 M NaOH? a. 12.0 b. 10.1 c. 9.5 d. 7.0 5. The compound C3H6 most likely contains which of the following combinations of bond types? a. single bonds only b. single + double bonds c. ...continues

Chemistry Questions

5. An unknown compound with molecular weight 84.9 g/mol has 14.1% C, 2.4% H, the rest is Cl. The most likely molecular formula for this compound is: a. CH3CL b. C2H4CL4 c. CH2CL2 d. CHCL3 6. The Lewis Structure for dimethyl ether, CH3OCH3 would show how many non-bonded (lone) electron pairs? 7. The most basic species ...continues

Standard reduction potentials

In an experiment using nickel and copper, and using the standard reaction potential table, which substance would be reduced, Cu or Ni.

Chemistry Problems

1. A sample of unknown Y is subjected to elemental analysis. The follwoing precentages by weight are found to be: C 40.0% H 6.7% O remainder of % by weight The molar mass is found to be 60.0 g A. Calculate the empirical formula (show work) B. What is the molecular formula of unknown Y. (Include r ...continues

Chemistry

1. Write the electron configuration for Calcium. Draw a line angle structural formula for 3-methyl pentane 2. Draw the majoe and minor resonance structure for the carbonate ion (CO3^-2). Include any formal charges, Indicate which are the major resonance structures and why. 3. Consider the species CH3SO3H, CH3CH2OH and C ...continues

Resonance, bond angle, conformation

See the attached document. There are three brief questions.

How many stereoisomers of (S)-adenosylmethionine are theoretically possible?

How many stereoisomers of (S)-adenosylmethionine are theoretically possible? Enter your response as the integernumber. The higher PKa value corresponds to the { STRONGER / weaker } acid. State which one is right. Calculate the degree of unsaturation number of missing H2 units relative to an alkane for the Compound with ...continues

A sample of unknown Y is subjected to elemental analysis...

1. A sample of unknown Y is subjected to elemental analysis. The follwoing precentages by weight are found to be: C 40.0% H 6.7% O remainder of % by weight The molar mass is found to be 60.0 g A. Calculate the empirical formula (show work) B. What is the molecular formula of unknown Y. (Inclu ...continues

Reactions

I have a problem with reactions. CH3-CH2-C-CH3 + (O) THERE IS AN -OH AND A METHYL ATTACHED TO THE SINGLED OUT -C And also the same problem, but reacting with H+