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total molar concentration of ions

| March 13, 2017

total molar concentration of ions
What is the total molar concentration of ions in each of the following solutions?

a.) 1.365M of CH3OH

b.) 0.300M of HClO4

total molar concentration of ions

Fischer Esterification

| March 13, 2017

Fischer Esterification

Benzoic acid, and excess of methanol, and some concentrated sulfuric acid are refluxed. After the reaction has been completed, the mixture is cooled down. The student observes a copious amount of white solid. Identify the solid. How should the student proceed with the experiment?

Fischer Esterification

basic chemistry

| March 13, 2017

basic chemistry
Why can’t a metal form an alloy with a non-metal?

Why don’t helium, neon, and argon (among others) form ions?

basic chemistry

Calculate the delta H

| March 13, 2017

Calculate the delta H

Use the following chemical reactions to calculate the delta H value for the following chemical reaction:

2 H2S (g) + SO2 (g) ——> 3 S (s) + 2 H2O (l) Delta H = ?? KJ

H2 (g) + 1/2 O2 (g) —-> H2O Delta H = -285.8 KJ

H2 (g) + S (s) ——> H2S Delta H = -20.6 KJ

Calculate the delta H

helium filled balloon

| March 13, 2017

helium filled balloon

Why does a helium filled balloon rise even if the helium (and balloon) are at the same temperature as the ambient air surrounding them?

helium filled balloon

the maximum number of electrons in an atom

| March 13, 2017

the maximum number of electrons in an atom
What is the maximum number of electrons in an atom that can have the following set of quantum numbers?

n = 4, l = 3, ml = -2, ms = + 1/2

the maximum number of electrons in an atom

Organic chemistry

| March 13, 2017

Organic chemistry

This question is concerning a Lab Experiment in Organic Chemistry. The lab is synthesis of benzoic acid. The question is, Do you think acetaldehyde gives a positive haloform reaction?.

Organic chemistry

Calculate the BOD5

| March 13, 2017

Calculate the BOD5
Calculate the BOD5 using the following data.

Sample volume = 300 mL
Day 0 DO reading = 9 mg/L
Day 5 DO reading = 2.5 mg/L

and explain pls.

Calculate the BOD5

organic chemistry

| March 13, 2017

organic chemistry

Calculate the percent yield of the reaction below using the given information.

0.10 g Cmpd A + 0.040 g Cmpd B -> 0.070 g Cmpd C

MW Compound A = 200 g/mol
MW Compound B = 100 g/mol
MW Compound C = 300 g/mol

organic chemistry

Organic chemistry

| March 13, 2017

Organic chemistry
(1R,2S,3R)-2-chloro-1-ethyl-3-methyl-cyclohexane darw the planar structure using the wedge to show the stereochemistry of the substituent group.

Organic chemistry