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To obtain the answer to the second part of the problem, the same
conversions are used, in a series of three steps:

(1) grams NH 3 → moles NH 3 (1 mol NH 3 = 17.0 g NH 3)
(2) moles NH 3 → moles N 2 (1 mol N 2 ∝ 2 mol NH 3)
(3) moles N 2 → grams N 2 (1 mol N 2 = 28.0 g N 2)

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mass N 2 = 3.00 x 10 g NH 3 x 1 mol NH 3/17.0 g NH 3 x 1 mol N 2/2 mol
NH 3 x 28.0 g N 2/1 mol N 2

mass N 2 = 2.47 kg N 2 (answer)

4. The most dangerous chemicals in your set are:

a. C1000 & C3000: Potassium Hexa-cyanoferrate(II) – do not
release this back into the environment, as it is harmful to
aquatic organisms, , so dispose of in container as directed. Do
not inhale the dust, and avoid contact with skin and eyes.

b. C1000 & C3000: Hexamethyl-eneteramine – flammable, do not
inhale the dust and avoid contact with skin, always wear
protective gloves when handling.

c. C1000 & C3000: Copper Sulfate – wear protective gloves and
glasses when handling, very poisonous to aquatic organisms, so
dispose of in container as directed. Do not release into
environment.

a. C3000: Calcium Hydroxide – do not inhale dust, wear protective
gloves and glasses when handling, caustic.

b. C3000: Potassium Permanganate – flammable, wear protective
gloves and glasses when handling, very poisonous to aquatic
organisms, so dispose of in container as directed. Do not release
into environment.

c. C3000: Sodium Hydrogen Sulfate – caustic, wear protective
gloves and glasses when handling.

d. C3000: Hydrochloric Acid –wear protective gloves and glasses
when handling. You’ll be generating a small amount of a weak
solution of this with your experiments, so follow all directions
carefully.

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