User George Tian

9 votes

2 answers

6k views

Which of the following species has an enthalpy change of formation = 0 kJ/mol?

asked Jul 1, 2017 at 0:16

9 votes

3 answers

2k views

Unknown notation relating to stoichiometry

asked Jan 8, 2018 at 22:13

9 votes

2 answers

10k views

Participation of Pi-bonds and lone pairs in resonance

asked Apr 2, 2018 at 1:28

9 votes

3 answers

776 views

Which chemical reactions don't involve bond breaking?

asked Jul 28, 2018 at 5:22

7 votes

2 answers

2k views

Why is a very small peak with larger m/z not considered to be the molecular ion?

asked Mar 10, 2019 at 12:08

7 votes

3 answers

3k views

How much calcium hydroxide will precipitate after addition of sodium hydroxide into saturated calcium hydroxide solution?

asked Jan 16, 2018 at 5:17

6 votes

1 answer

1k views

Equilibrium between barium carbonate, and barium oxide and carbon dioxide

asked Jan 13, 2018 at 5:59

6 votes

2 answers

697 views

NMR - coupling of chemically equivalent protons

asked May 15, 2018 at 12:48

5 votes

5 answers

1k views

Can halogens exist in their elemental state in nature?

asked Apr 1, 2018 at 11:22

4 votes

1 answer

889 views

Finding equilibrium constant from solubility product constant

asked Jan 4, 2018 at 5:29

3 votes

1 answer

1k views

USNCO question - Finding pH of salt solution from pKa of its parent acid

asked Jan 2, 2018 at 6:38

3 votes

1 answer

7k views

Effective Nuclear Charge of Noble Gases

asked Sep 21, 2017 at 0:30

3 votes

2 answers

20k views

Clarification of Kinetic Energy during Phase Change

asked Sep 4, 2017 at 9:26

3 votes

1 answer

2k views

How to qualitatively compare bond strength? [closed]

asked Apr 28, 2018 at 11:55

2 votes

3 answers

1k views

Comparison of chemical shift of methyl group attached to alcohol and carboxylic acid

asked Mar 12, 2019 at 8:36

2 votes

2 answers

2k views

Reactivity of primary and tertiary alkyl halides

asked Jan 14, 2019 at 0:27

2 votes

1 answer

2k views

Ionisation Energy vs First Ionisation Energy [closed]

asked Sep 13, 2017 at 10:55

2 votes

1 answer

584 views

USNCO Question - Determining solute using spectrophotometer

asked Dec 29, 2017 at 1:57

2 votes

1 answer

460 views

Voltage applied when charging a galvanic cell

asked Apr 9, 2018 at 6:21

2 votes

0 answers

349 views

How to compare standard entropy of diatomic gases?

asked Apr 11, 2018 at 11:24

1 vote

1 answer

61 views

What is the term for passing an eluate back through an adsorption column?

asked Jun 10, 2019 at 10:35

1 vote

0 answers

66 views

Does the Nernst equation suggest voltaic cell voltage remains constant over time?

asked Nov 27, 2018 at 5:03

0 votes

0 answers

99 views

Comparing the number of oxidation states of Vanadium and Arsenic

asked Jan 9, 2019 at 23:55

0 votes

0 answers

29 views

How would one determine the yield of primary vs. secondary hydrohalogenation addition products?

asked Mar 12, 2019 at 23:49

0 votes

1 answer

172 views

Equilibrium expression for dissolution of carbon dioxide

asked Oct 14, 2018 at 11:12

0 votes

2 answers

8k views

How many resonance structures does the oxalate ion have?

asked Apr 13, 2018 at 13:02

0 votes

0 answers

274 views

Steric hindrance during Hydroboration

asked Apr 14, 2018 at 0:13

0 votes

1 answer

700 views

How to calculate energy gap when determining electron configuration?

asked Sep 19, 2017 at 0:12

-3 votes

1 answer

3k views

Uncertainty of Atomic Mass [closed]

asked Jul 27, 2017 at 1:31

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29 Questions

Which of the following species has an enthalpy change of formation = 0 kJ/mol?

Unknown notation relating to stoichiometry

Participation of Pi-bonds and lone pairs in resonance

Which chemical reactions don't involve bond breaking?

Why is a very small peak with larger m/z not considered to be the molecular ion?

How much calcium hydroxide will precipitate after addition of sodium hydroxide into saturated calcium hydroxide solution?

Equilibrium between barium carbonate, and barium oxide and carbon dioxide

NMR - coupling of chemically equivalent protons

Can halogens exist in their elemental state in nature?

Finding equilibrium constant from solubility product constant

USNCO question - Finding pH of salt solution from pKa of its parent acid

Effective Nuclear Charge of Noble Gases

Clarification of Kinetic Energy during Phase Change

How to qualitatively compare bond strength? [closed]

Comparison of chemical shift of methyl group attached to alcohol and carboxylic acid

Reactivity of primary and tertiary alkyl halides

Ionisation Energy vs First Ionisation Energy [closed]

USNCO Question - Determining solute using spectrophotometer

Voltage applied when charging a galvanic cell

How to compare standard entropy of diatomic gases?

What is the term for passing an eluate back through an adsorption column?

Does the Nernst equation suggest voltaic cell voltage remains constant over time?

Comparing the number of oxidation states of Vanadium and Arsenic

How would one determine the yield of primary vs. secondary hydrohalogenation addition products?

Equilibrium expression for dissolution of carbon dioxide

How many resonance structures does the oxalate ion have?

Steric hindrance during Hydroboration

How to calculate energy gap when determining electron configuration?

Uncertainty of Atomic Mass [closed]