Question 3 of 10 Which of the following is the best definition of a chemical change?
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O A. A change in a substance where one or more new substances form
O B. A change in a substance where no new substance forms
O C. A change in a substance where energy is conserved
О
D. A change in a substance where a phase change occurs
SUBMIT

A change in a substance where one or more new substances form

Explanation:

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