Andy hid a paper clip in one paper hat. He hid a crayon in another paper hat. Sam held a magnet near each paper hat. What happened?

A) The hat with a crayon pushed away from the magnet.
B) The hat with a crayon was pulled towards the magnet.
C) The hat with the paper clip was pulled towards the magnet.
D) Both hats stayed in their starting positions and did not move.

calculate how many grams of ammonia can be produced from 4.21 grams of

n2 + 3h2 = 2nh3

my answer:

25.0g n2 x (1 mol/ 28.0gn2) x (2 mol nh3/ 1 mol n2) x (17.0g nh3/ 1 molnh3) = 30.36g n2

25.0g h2 x (1 mol h2/ 2.00g h2) x (2 mol nh3/ 3 mol h2) x (17.0g nh3/ 1 mol nh3) = 141.67g h2

lr = n2

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

: )

personal, she chose to do it.