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I color change
Il production of gas
III temperature change
IV precipitate
I and II
19.
I, II, III, IV
A student mixes two clear solutions. Which of the above is evidence that a chemical
reaction is occurring?
O
II and III
II, III, and IV
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frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;