8. Given the reaction Ca + 2H,0 - Ca(OH)2 + H2, what is the total number of moles of Ca need react completely with 4.0 mol of H,0?
a. 0.55 mol
b. 1.0 mol
C. 2.0 mol
d. 4.0 mol
les of H, O that
of KCIO,
9. Consider the reaction: CH (9) + 20,(9) - CO2(g) + 2H,0(9). How many moles of oxygen ar
needed for the complete combustion of 3.0 mol of CH (9)?
a. 2.0 mol
b. 3.0 mol
c. 4.0 mol
d. 6.0 mol
10. According to the reaction 2Al + 3H, SO. - 3H, + Al(SO4)3, the total number of moles of H, SC
needed to react completely with 5.0 mol of Al is
a. 2.5 mol
b. 5.0 mol
c. 7.5 mol
d. 9.0 mol
1
is presenting
11 Given the priuation Nin) + 3H (n) - NHYO) what is the total number of moles of H2SO4 needed to react completely with 5.0 mol of Al is...?

the millers tale is the answer.

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.