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IBSL Chemistry Questions and Answers (Q&A)

H.Donna
Answered: Jan 17, 2018
Bonds are made of energy. There are certain energy changes that occur during the making or breaking of bonds and this is called enthalpy changes. When a bod is broke, energy is required to break...Read More

2 Answers

659 views
Bobby Rickets, Content Reviewer
Answered: Nov 27, 2018
Correct answer option C - the amount of reactants and product do not change is always true for a chemical reaction that has reached equilibrium. Chemical reaction at equilibrium occurs when...Read More

2 Answers

541 views
F. Ray, Student
Answered: Feb 11, 2019
An equilibrium in science refers to the elements on all side of the situation are balanced. One element doesn’t overpower another item. They are all balanced and the same. There are times...Read More

2 Answers

363 views
T. Moore, Writer
Answered: Dec 04, 2018
For those uninitiated to chemistry (like me), enthalpy is just the amount of heat that is given off in a specific chemical reaction. If a typical carbon-hydrogen bond gives off 412 kilojoules per...Read More

2 Answers

304 views
K. Myers, Blogger
Answered: May 01, 2019
The answer to this question is A. This is a type of limiting reactant problem wherein the acid is in deficiency. Half of the dihydrogen will evolve depending on the amount that will be placed. To...Read More

2 Answers

278 views
John Adney
Answered: May 01, 2019
I feel that the answer is incorrect - it should be H2S and H2O.

H2S is a gaseous and polar molecule - it is held together by dipole-dipole interactions between the hydrogen and sulfur...Read More

2 Answers

272 views
F.Brian
Answered: Jan 29, 2018
It is not true to say the one mole of hydrogen gas contains 6.02x 10^23 atoms of hydrogen. However, some true statements that involve hydrogen would be that one molecule of methane contains four...Read More

2 Answers

261 views
John Smith
Answered: Apr 08, 2020
Is exothermic with a negative enthalpy energy

1 Answer

261 views
G. Roland, Professor
Answered: Oct 09, 2018
The answer to this is A. For those who are not familiar with what ammonium nitrate is, this is a type of chemical compound that is used in order to fertilize different plants and crops. People...Read More

2 Answers

257 views
John Smith
Answered: Apr 08, 2020
Reactants are more stable and sign of difference of enthalpy energy is positive

1 Answer

252 views
John Adney
Answered: Oct 11, 2017

How do you solve this and not get 60 as your answer

2 Answers

245 views
Carice Snow, Motivator
Answered: Jun 14, 2019
The correct answer to this question is A, T2=∆T1. Temperature changes are one of many ways an indication of a chemical change is occurring. Other signs include a change in color, an odor, and...Read More

2 Answers

239 views
Ssamreth
Answered: Apr 08, 2020
13.3 KJ of energy are absorbed for every mole of Fe reacted

1 Answer

227 views
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