What are the main indications that a chemical reaction has occurred

Which of the following is an organic compound? ammonia (NH3) calcium sulfide (CaS) octane (C8H18) sulfur trioxide (SO3)

Consider the oxidation of sodium metal to sodium oxide described by the balanced equation: 4 Na (s) + O2 (g) → 2 Na2O (s) As you can see there are letters in parentheses after each substance.

The reaction described by H2 (g) + I2 (g) ⟶2HI (g) has an experimentally determined rate law of rate=k[H2][I2] Some proposed mechanisms for this reaction are: Mechanism A (1) H2 (g) + I2 (g) - →k12HI (g) (one-step reaction) Mechanism B (1) I2 (g) ⥫⥬=

The vector quantity that defines the distance and direction between two positions. Example: James was 20 meters north of his house. Type the word that match the definition here

How many grams of hydrochloric acid are needed to produce 1.28 grams of zinc chloride

What is buffer solution?

How can you simulate the radioactive half-life of an element?

What are the horizontal rows on the periodic table?

What is 19 hundred thousandths in scientific notation

There state of matter that keeps its shape and volume when it is placed in a container