C165 6 Questions with CORRECT Answers
Question:
When NaCl forms, each Na atom transfers an electron to a Cl atom.
Answer:
+2 +1
Question:
Before the water begins to boil, thermal energy
Answer:
_. remains the same. increases. decreases. increases.
Question:
While the water boils, the average kinetic energy of the water
Answer:
molecules ______ remains the same. decreases. increases. remains the same.
Question:
How does a physical change differ from a chemical change?
Answer:
A chemical change produces new substances. A chemical change involves water. A
chemical change involves chemicals such as sodium chloride. A chemical change can
reduce or increase the amount of matter. A chemical change produces new
substances.
Question:
After analyzing different eggs you
Answer:
conclude that egg whites each have about 50 mg of sulfur in them. Based on the
relative mass of iron and sulfur atoms, you conclude that the 50 mg of sulfur can
react with 92 mg of iron to form FeS. 50 mg of sulfur (S) can react completely
with 92 g of iron (Fe) to produce FeS. The equation
, Question:
When shaking salt from a salt shaker, you see that the salt, which is sodium
chloride (NaCl), is in the form of many small crystals.
Answer:
Covalent bonds between the chlorine atoms
Question:
What holds the Na particles and Cl particles in place inside the crystals?
Answer:
Metallic bonds between the atoms of sodium metal Ionic bonds between sodium and
chlorine Covalent bonds between sodium and chlorine Ionic bonds between sodium and
chlorine
Question:
Which compound would be MOST
Answer:
Aluminum chloride (AlCl3) Calcium chloride (CaCl2) Potassium chloride (KCl)
Question:
When the liquid propellant evaporates to form a gas, it absorbs thermal energy.
Answer:
Rocks become smooth when they tumble in the surf
Question:
Which of the following is a chemical change?
Answer:
A metal bridge turns brown as it rusts Water evaporates off a hot stovetop A metal
bridge turns brown as it rusts
Question:
Salt dissolves in water to form saltwater. Is this considered a chemical change or
a physical change?
Answer:
This is a chemical change. This is a physical change. This is a physical change.
Question:
When NaCl forms, each Na atom transfers an electron to a Cl atom.
Answer:
+2 +1
Question:
Before the water begins to boil, thermal energy
Answer:
_. remains the same. increases. decreases. increases.
Question:
While the water boils, the average kinetic energy of the water
Answer:
molecules ______ remains the same. decreases. increases. remains the same.
Question:
How does a physical change differ from a chemical change?
Answer:
A chemical change produces new substances. A chemical change involves water. A
chemical change involves chemicals such as sodium chloride. A chemical change can
reduce or increase the amount of matter. A chemical change produces new
substances.
Question:
After analyzing different eggs you
Answer:
conclude that egg whites each have about 50 mg of sulfur in them. Based on the
relative mass of iron and sulfur atoms, you conclude that the 50 mg of sulfur can
react with 92 mg of iron to form FeS. 50 mg of sulfur (S) can react completely
with 92 g of iron (Fe) to produce FeS. The equation
, Question:
When shaking salt from a salt shaker, you see that the salt, which is sodium
chloride (NaCl), is in the form of many small crystals.
Answer:
Covalent bonds between the chlorine atoms
Question:
What holds the Na particles and Cl particles in place inside the crystals?
Answer:
Metallic bonds between the atoms of sodium metal Ionic bonds between sodium and
chlorine Covalent bonds between sodium and chlorine Ionic bonds between sodium and
chlorine
Question:
Which compound would be MOST
Answer:
Aluminum chloride (AlCl3) Calcium chloride (CaCl2) Potassium chloride (KCl)
Question:
When the liquid propellant evaporates to form a gas, it absorbs thermal energy.
Answer:
Rocks become smooth when they tumble in the surf
Question:
Which of the following is a chemical change?
Answer:
A metal bridge turns brown as it rusts Water evaporates off a hot stovetop A metal
bridge turns brown as it rusts
Question:
Salt dissolves in water to form saltwater. Is this considered a chemical change or
a physical change?
Answer:
This is a chemical change. This is a physical change. This is a physical change.
