Question

Lithium reacts with bromine (Br2) in a synthesis reaction to produce lithium bromide. Determine the limiting reactant if 25.0 grams of lithium and 25.0 grams of bromine are present at the beginning of the reaction.

limiting reactant = bromine

limiting reactant = lithium

limiting reactant = both lithium and bromine

neither lithium nor bromine are the limiting reactant because they are both equal

Answer 1

2Li + Br2 -->2LiBr

Given the mass of the reactants 25.0grams of Br is a lot lot less than 25.0g of Li so im going to assume that Bromide is definitely the limiting reactant

Answer 2

for some reason i was thinking lithium. oh well :P

Answer 3

:/


It is impossible to determine the percent composition of elements in a compound if you do not know the compound's chemical formula or the mass of each element in a sample of that compound.
Selected Answer:
FALSE
Correct Answer:
TRUE
Response Feedback:
In order to determine the percent composition, it is imperative to know either that compound's chemical formula or the mass of each element in a sample of that compound.

Answer 4

alright how many did i screw up

Answer 5

5

Answer 6

You were right on that one. Your chem knowledge is going to pass me up

Answer 7

its ok tho :) i dont expect you to be perfect :)

Answer 8

okok for the sake of an arguement i need your opinion

Answer 9

Thanks :/. Yea I try to retain as much of this stuff that I can but to be honest I havent taken chem in over a year.

Answer 10

All purely off memory

Answer 11

niiice your pretty good then :)

An example of an adaptation is ______.

the color of a bird's feathers
the shape of a bird's beak
the color of a bird's feet
all the above

Answer 12

Ugggggh this question is tough.

Answer 13

Heres my thinking on this question so far

Answer 14

I think an adaptation is technically any change as long as it illicits a beneficial response for the organism in its environment.

Answer 15

Ill google it real quick see what i can find

Answer 16

So google specifically said this "In biology, adaptation is the process by which an organism changes to become better suited to survive in their environment."

Answer 17

I dont know how the color of a birds feet would be beneficial. Maybe feather color could help camoflauge. I do know that a change to beak shape could allow access to more food resources.

Answer 18

Maybe b..?

Answer 19

ok thanks :) myself and one other person agreed and another person did not so i wondered

Answer 20

Yea, that question is pretty tricky/tough imo.

Answer 21

lol can you help with some american gov

Answer 22

@sweetburger

Answer 23

i may be of very little help i took american gov back in 9th grade