The carbon dioxide exhaled by astronauts can be removed by its reaction with lithium hydroxide, lioh, according to the following chemical equation: co2(g) + 2lioh(s) — li2co3(s)
+ h2o4). how many moles of lithium carbonate are produced when 20.0 mol co2 the average
amount exhaled by a person each day, reacts completely with lithium hydroxide?

20.0 mol

Explanation:

The balanced chemical equation is already given for this process. According to the corrected balanced chemical equation, carbon dioxide reacts with 2 moles of lithium hydroxide to produce 1 mole of lithium carbonate and 1 mole of water:

Notice that the problem states that 20.0 mol of carbon dioxide react completely. This implies that carbon dioxide is the limiting reactant. According to the balanced chemical equation, 1 mole of carbon dioxide produces 1 mole of lithium carbonate (pay close attention to the coefficients in the balanced chemical equation).

This means if we have 20.0 mol of carbon dioxide, we can produce a maximum of 20.0 mol of lithium carbonate.

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.