Which of the four spheres of the Earth encompasses all of the gases at and above the Earth's surface?
1. Biosphere
2. Atmosphere
3. Lithosphere
4. Hydrosphere

Explanation:

the correct answer is the atmosphere, for it is the sphere of all gases surrounding the Earth

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

let that person have a turn to speak : )