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Biology 80 Online
OpenStudy (wolfshadow009):

I need help on my Physical Science Lab: Classifying Reactions from Connections. Can someone help me?

OpenStudy (anonymous):

Please can u explain your question clearly to me I don't understand

OpenStudy (wolfshadow009):

@Daniel56k sorry, I have a Lab due and i only have 2 days left to do it. Its at least a 5 day lab.

OpenStudy (anonymous):

1. 4Fe+3O2»2Fe2O3

OpenStudy (wolfshadow009):

@Daniel56k Thank you!

OpenStudy (anonymous):

2. It is a redox reaction....iron oxidizes while oxygen reduces

OpenStudy (anonymous):

3 since the iron can oxidize how does it change its appearance

OpenStudy (anonymous):

Can u answer that question

OpenStudy (wolfshadow009):

It turns ito rust correct? so it would be a orange-red color and would be brittle. Right?

OpenStudy (anonymous):

U are kind off right but that's not the answer I expect....iron gains mass it does not loss mass by rusting

OpenStudy (anonymous):

Balanced equation: 2H2O2 → 2H2O + O2 2) this is a decomposition reaction 3) The container of H2O2 plus the catalyst will have lost mass. The H2O2 would have effervesced. A gas was produced that caused a glowing splint to ignite

OpenStudy (anonymous):

I got that from Trevor H

OpenStudy (anonymous):

This the best help I can give to u

OpenStudy (anonymous):

1. 2H2O2 --> 2H2O + O2 2. H2O2 --> H2 + O2 ; decomposition 3. Main reasons that a chemical reaction has taken place: a) bubbles -- gas is created b) steam -- heat is produced c) color change d) precipitates -- solid is formed 4. MgSO4 + 2NH4OH --> (NH4)2SO4 +Mg(OH)2 5. MgSO4 + 2NH4 --> Mg + (NH4)2SO4; single replacement 6. I don't know about this one, sorr

OpenStudy (wolfshadow009):

Thank you so much! This helps a ton! :)

OpenStudy (wolfshadow009):

@Daniel56k This is what I have so far. It most of it right?

OpenStudy (anonymous):

Change the answer for part 1 number 3 to iron changes in appearance and gain mass

OpenStudy (anonymous):

1) Zn(s) + 2 HO2CCH3(l) --> Zn(O2CCH3)2 + H2(g) There are two half reactions: Zn -->Zn (2+) + 2e- 2e- + 2 H+ --> H2 (the acetic acid ionized to form H+ and acetate- ions) 2) It's a red-ox (reduction-oxidation) reaction. The Zn gives up 2 electrons to the 2 hydrogen atoms. In general one element loses electrons and another gains electrons. The element gaining the electrons is the oxidizer and the element losing them is the reducing agent. The oxidizer becomes reduced and the reducing agent becomes oxidized. 3) Hydrocarbons and oxygen.

OpenStudy (anonymous):

The last post of mine is for part 3

OpenStudy (wolfshadow009):

ok thank you!

OpenStudy (anonymous):

U are wellcome

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