Onsider this reaction:

h2(g)+cl2(g)→2hcl(g)

how many liters of hcl are produced when 56 l of chlorine are reacted with excess hydrogen?

(one mole of any gas occupies 22.4 l under certain conditions of temperature and pressure. assume those conditions for this question.)

22.4 l

56 l

112 l

224 l

112 is correct answer

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

24

the answer is barium and copper bromide

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.