Question

#1: The following reaction does not proceed to form a product: H2O + Au---> no reaction. Why is that?

A. Gold has a higher activity than hydrogen and cannot replace it.

B. Gold has a lower activity than hydrogen and cannot replace it.

C. The reaction cannot occur because water is a reactant.

D. The reaction proceeds too slowly to create products.

**my answer; B

im not too sure on this one tho :(

Answer 1

#2: Which of the following is the balanced form of the equation C2H6 + O2 --> CO2 + H2O?

answer choices attached A,B,C,D top to bottom :)

**my answer; D

is that right?

Answer 2

what do they mean by activity? nothing would happen because Au is not reactive (too stable, and highly difficult to oxidize)

Answer 3

#3: The equation 2NaNO3 + CaCl2 ---> 2NaCl + Ca(NO3)2 is balanced. How many atoms of sodium (Na) are there on either side of the equation?

A. one

B. two

C. four

D. six


**my answer: B. two

is that right?

Answer 4

2 and 3 are right

Answer 5

#4: All single-displacement reactions can be classified as another type of reaction as well. What type of reaction is that?

A. combustion

B. redox

C. synthesis

D. decomposition

**ugh.. im bad with definitions haha :P idk is it B. redox or D. decomposition?? idk this one :(

Answer 6

redox

Answer 7

#5: If ions change places and a gas is formed, then what type of reaction is indicated?

A. double-displacement

B. synthesis

C. decomposition

d. single-displacement

**not too sure.. I'm debating b/w A and C... what do u think?

Answer 8

wait so what's #1?? idk like they mean reactions by activity... i think... haha :P

Answer 9

and yay for 2 and 3!! :D

and so #4 is B. redox ??

Answer 10

yep 4 is redox, 1 I'm not sure, as i don't know what they mean by "activity", I've never seen that used in that fashion

Answer 11

yeah idk :( that was one i was kinda confused on.. well more confused that the others haha :P

and what do u think bout #5?

Answer 12

and so u don't get #1 at all?? :/

Answer 13

5 maybe decomposition

Answer 14

for 1 i can't answer, because I've never heard of this "activity", there is a term activity but its not used in this context

Answer 15

ohh okay :/ I'm thinking activity means like chemical reactions,... thats how it was used b4... :/ does that help?

Answer 16

so #5 is decomposition??

Answer 17

yep i mean i would say it's both, but you don't always form a gas in a double displacement, but you don't always double displace in a decomposition... :S

Answer 18

but go with decomposition

Answer 19

ohhh okay :) so for #1, i should just wing it?? haha :/

Answer 20

unless you have an example somewhere in your books/notes you can look at and compare

Answer 21

i looked up on google and a few of them said it had lower activity

Answer 22

so go with B

Answer 23

umm well theres nothing in my book :(

and okay then :) thanks!! :D hopefully its right!! :D

Answer 24

hope so!

Answer 25

crossing my fingers :D