Which solution is the most concentrated?

2.0 ml of 10 m h2so4, where h2so4 has a molar mass of 98 g/mol
5.0 ml of 1.0 m pbso4, where pbso4 has a molar mass of 303 g/mol
2.0 ml of 10.5 m h2o2, where h2o2 has a molar mass of 34 g/mol
100 ml of 10 m nacl, where nacl has a molar mass of 58 g/mol

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

its first and third is your answer i did the qustion the fourth isnt right

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter