Chemical Reactions

Front

In a chemical equation, what do the coefficients indicate?

Back

The coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made.

Front

What information can be determined from the chemical formula C₆H₁₂O₆?

Back

The number of atoms of each element in a glucose molecule

Front

Evidence supporting the inference of a chemical reaction when zinc metal is placed in CuSO₄ solution.

Back

A dark solid formed on the zinc metal.

Front

The reactants are on the left side of the chemical equation.

Back

True

Front

Two clear colorless solutions were combined. The student observed that the temperature changed from 25 •C to 23 •C when the solutions were combined and that a white substance rapidly formed and settled to the bottom of the container. What most likely happened to produce these results?

Back

The solutions reacted chemically

Front

In which of these compounds are there twice as many oxygen atoms as hydrogen atoms? Options: H₃PO₄, H₂SO₄, HCIO₃, H₂0

Back

H₂SO₄

Front

How many atoms in all are in a molecule of serotonin? C₁₀H₁₂N₂O

Back

25

Front

In a ___________change, a substance changes into a different substance.

Back

Chemical

Front

Classify the reaction: 4Si + S₈ --> 2Si₂S₄

Back

Synthesis

Front

Classify the reaction: 3Ca + 2AlCl₃ --> 3CaCl₂ + 2Al Options: Synthesis, Decomposition, Single displacement, Double displacement

Back

Single displacement