12. Choose words from the list below to complete the following paragraph- Aqueous
Mixture
Solution
Heterogeneous
Homogeneous
Extensive
Gaseous
Solid
Pure Substances
A...(a) is a combination of pure substances. There are two kinds of mixtures. A
(b) Has visible boundaries; a ...(c)... mixture has no visible boundaries.
A homogeneous mixture is also called a (d) A substance dissolved in water is an
...(e) Solution. Air is a (f) solution consisting of mainly oxygen and nitrogen
molecules. Air, ocean, soil, rocks and all living things all consist of ...(g)... mixed together​

Write a hypothesis that answers the lesson question, “while observing a chemical reaction, how can you tell which reactant is limiting? ” hypothesis: if a substance is the limiting reactant, then . . because . .

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .

Anitrogen atom and an oxygen atom combine chemically to form nitric oxide. what is nitric oxide?