An adult with the flu has a temperature of 103.0 ∘f.
express your answer as an integer.

a brain contains 1.10×10^10 neurons.
express your answer as an integer.

the time for a nerve impulse to travel from the feet to the brain is 0.46 s.
express your answer as an integer.

A integer is a whole number.

For example 3

45

3001

694

2307

Integer will not be a fraction like 1.25

2.345

6.7890

2.222

Integer can be negative or zero or positive  

For example  

-24

-5067

0

+35

+4567

So the Answers are  

An adult with the flu has a temperature of

A brain contains neurons (moving the decimal point to the right side power of 10 increases........here decimal point is moved to two places to the right side so power of 10 decreases from 10 to 8)

The time for a nerve impulse to travel from the feet to the brain is s. (moving the decimal point to the right side power of 10 increases........here decimal point is moved to two places to the right side so power of 10 decreases from 0 to -2)

n2(g) + 3h2-> 2nh3(g)   this is the balanced equation

note the mole ratio between n2, h2 and nh3.   it is 1 : 3 : 2   this will be important.

moles n2 present = 28.0 g n2 x 1 mole n2/28 g = 1 mole n2 present

moles h2 present = 25.0 g h2 x 1 mole h2/2 g = 12.5 moles h2 present

based on mole ratio, n2 is limiting in this situation because there is more than enough h2 but not enough n2.

moles nh3 that can be produced = 1 mole n2 x 2 moles nh3/mole n2 = 2 moles nh3 can be produced

grams of nh3 that can be produced = 2 moles nh3 x 17 g/mole = 34 grams of nh3 can be produced

note:   the key to this problem is recognizing that n2 is limiting, and therefore limits how much nh3 can be produced.