When an object is lifted 12 meters off the ground, it gains a certain amount of potential energy. if the same object is lifted 24 meters off the ground, its potential energy is which of the folowing? the same. b. three times as much. c. four times as much. d. twice as much.

D. twice as much.

Explanation:

The question varies the potential energy at two different heights.

The formular for potential energy is given as;

P.E = m × g × h

where;

m = mass

g = gravitational force

h = height

In both cases, m and g are both constants so we have;

First Case; P.E = mg * 12 (when h = 12)

Second Case; P.E =mg * 24 (when h = 24)

Comparing both cases, we can deduce that;

Second Case =  2 * First Case.

This means that the potential energy would be twice as much.

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

the answer is true. hope it .