Chemistry, 30.03.2020 18:51 kemzzoo9338

Which answer includes all the following that are chemical changes and not physical changes? I. freezing of water II. rusting of iron III. dropping a piece of iron into hydrochloric acid (H2 is produced) IV. burning a piece of wood V. emission of light by a kerosene oil lamp

Answers: 2

Show answers

Another question on Chemistry

Chemistry, 22.06.2019 11:30

What is the main reason why some developing countries fear the increase the free trade policies around the world?

Answers: 2

Answer

Chemistry, 23.06.2019 02:00

Anitrogen atom and an oxygen atom combine chemically to form nitric oxide. what is nitric oxide?

Answers: 1

Answer

Chemistry, 23.06.2019 08:00

Suppose a pair of chemical compounds a and b can react in two different ways: a + b -> c reaction 1 gives product c. a + b -> d reaction 2 gives product d. the following facts are known about the two reactions: . reaction 1 is endothermic and reaction 2 is exothermic. if a reaction vessel is charged (filled) with a and b , then at first d is produced faster than c. use these facts to sketch a qualitative reaction energy diagram for both reactions. note: because these sketches are only qualitative, the energies don? t have to be exact. they only have to have the right relationship to each other. for example, if one energy is less than another, that fact should be clear in your sketch.

Answers: 3

Answer

Chemistry, 23.06.2019 12:50

Complete the paragraph to describe the characteristics of a borane molecule (bh3). the lewis structure and table of electronegativities are given. the bond polarities in bh3 are , the molecular shape is , and the molecule is .

Answers: 2

Answer

You know the right answer?

Which answer includes all the following that are chemical changes and not physical changes? I. freez...

Questions