3. Jay had two clear liquids in bottles. The mass of one liquid was 10.2 grams and the other
was 7.6 grams. When he mixed them, a yellow solid formed and settled to the bottom of
the bottle. He predicted that the liquid plus the solid would have more mass, so he put the
bottle on a scale. The mass was 17.8 grams.
Why did the mass not change?
a. A chemical reaction occurred, which means the atoms rearranged to form new
substances.
b. A chemical reaction occurred, which means even though the old atoms turned into
new atoms, they had the same mass.
C. Jay must have made an error in measuring the mass before or after he mixed the
liquids.
d. One of his classmates probably did something to affect his experiment.

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).