Rusting is an example of a\n(A)physical change\n(B)chemical change\n(C)both A and B\n\nWhich do you think is the answer.
200977
It is chemical change. The material ( generally metal) gets oxidised when left in air and this is termed as rust.
432465
as long as no new substance is formed and the change is not permanent/irreversible,it is physical change
441131
1) increases\n2) decreases\n3) remains the same \n4) increases\n5) decreases\n6) increases
550947
b,\n\nall the others are ionic compounds.
285419
a)mixture..they are together but they are not bonded\nb)mixture\nc)compound\nd) compound...the molecules are chemically bonded
66446
the correct answer is B. A is wrong b/c it isn't an oxidation reduction reaction. Looking at a table of solubility products will confirm the answer is B.
364008
Could you give a few examples please?
209454
Mutation\n\nGrowth\n\nReproduction/division\n\nStarvation\n\nPoisons\n\nOsmotic changes
370341
b) changes\n\nwhen a plate moves it can do a number of things. it can make a mountain, volcano, island, etc.\n\nit doesnt collapse (stupid answer), it wont melt (why would it? all thats happening is a plate moving, that wouldnt melt earth) and it doesnt shrink just because it moves.
493072
1) b)\n\n2) [H2O]^2 / 2[H2] [O2]\n  \n   [NO]^2 / [N2] [O2]\n\n3) b)\n\n4) b)
515830
Part A:  equilibruim to the right because more co3 added\n\nPart B:  Equilibrum to left becausemore co2 added\n\nPart C:  Equilibrium to right to replace removed h20\n\nEquilibruim dynamic because although appears stable ions constantly moving back and forth just at the same time
544299
1) Fe(s) +Cu^2+(aq) --> Fe^2+(aq) + Cu(s)  Single replacement, redox reaction where iron is oxidized and copper is reduced\n\n2) 2Al(s)+(3/2)O2(g)-->Al2O3(s)\nredox reaction, oxygen is reduced (neutral to -2) and aluminum is oxidized (neutral to +3)
402270
a)4 Fe + 3O2--->2 Fe2O3\n\nCH4 + 2O2 ---> CO2 +2 H2O
478144
A) Valence Electrons\n\nI believe b, c and d show the results of the grouping not the reason they're grouped that way to start out with...\n \nb... No... The atom size increases instead of decreases\nc... No...\nc... No...  \nversa...
207396
C. Sandy washed and ironed her clothes\n\nwashed and ironed her clothes is the predicate and the "and" make it compound
332921
1, technically incorrect, however it is in common use.\n2. technically correct.\n3. correct\n4. incorrect
603572
d. mutualism\n\nNO WAIT....I changed my mind,  um...     a. competition\n\n\nWait Wait!!!!  um  It's       e. Research your homework for yourself.