15 questions
Identify the product(s) in the following word equation:
sodium reacts with chlorine to yield sodium chloride
Sodium
Sodium chloride
Sodium and Chlorine
Sodium and sodium chloride
Which statement is TRUE of reactants in a chemical reaction?
You write them on the right-hand side of the arrow.
They are what get produced in a chemical reaction.
They always stay the same.
Are the substances that you start with.
What are the new substances that are formed in a chemical reaction called?
Reactants
Atoms
Products
Reagents
What state of matter is this substance?
solid
liquid
gas
aqueous
What state of matter is this substance?
solid precipitate
dissolved in water
released as a gas
liquid
According to the chemical equation, which compound would form a precipitate?
Co(NO3)2
NaOH
NaNO3
Co(OH)2
What does the symbol inside the circle mean?
"yields, or produces"
"dissolved in water"
"forms a precipitate"
"released as a gas"
Which of the following statements is TRUE?
A molecule is smaller than an atom.
A molecule is made of atoms.
Molecules are found inside of atoms.
Which of the following statements about atoms is TRUE?
An atom is a blob of gelatinous goo.
An atom is bigger than a molecule.
An atom is made of many molecules.
An atom is a basic piece of matter.
Which of the following symbols represents a compound?
Co
Br
Fe
CO
Which of the following symbols shows only ONE element?
CU
Ar
KF
WO
What does the symbol CaCO3 represent?
An element
A compound
An atom
None of the above
Which of these is NOT the correct way to read the symbol in a chemical equation?
(g) = grams
(aq) = solution
(s) = solid
(l) = liquid
Which of the following chemical equations is correct for the word equation:
Solid magnesium is burned in oxygen gas to produce solid magnesium oxide.
Mg + O2→ MgO (aq)
Mg+ O→ MgO (s)
Mg + CO2 → MgO (s) + C
Mg + O2→ MgO (s)
Solid sodium reacts with chlorine gas to produce sodium chloride crystals.
NaCl (s)→ Cl(g) + Na(s)
Na (s)+ CO2 (g)→ NaCO2 (s)
Na (s) + Cl2 (g)→ NaCl (s)
Na (g) + Cl (s) → NaCl (s)