The correct response is:
lower activation energy
Catalysts accelerate chemical reactions by lowering the activation energy required for the reaction to proceed.
How do catalysts affect a chemical reaction?(1 point)
Responses
lose activation energy
lose activation energy
lower activation energy
lower activation energy
increase activation energy
increase activation energy
provide activation energy
provide activation energy
9 answers
What happens during rusting of an iron nail?(1 point)
Responses
Iron and oxygen combine to form iron oxide.
Iron and oxygen combine to form iron oxide.
Sulfur and oxygen combine to form a sulfur dioxide coating.
Sulfur and oxygen combine to form a sulfur dioxide coating.
Sulfur, iron, and oxygen combine to form iron sulfoxide.
Sulfur, iron, and oxygen combine to form iron sulfoxide.
Iron and sulfur combine to form iron sulfide.
Responses
Iron and oxygen combine to form iron oxide.
Iron and oxygen combine to form iron oxide.
Sulfur and oxygen combine to form a sulfur dioxide coating.
Sulfur and oxygen combine to form a sulfur dioxide coating.
Sulfur, iron, and oxygen combine to form iron sulfoxide.
Sulfur, iron, and oxygen combine to form iron sulfoxide.
Iron and sulfur combine to form iron sulfide.
The correct response is:
Iron and oxygen combine to form iron oxide.
Rusting is the process where iron reacts with oxygen in the presence of moisture to form iron oxide, commonly known as rust.
What does the forward arrow in a chemical equation mean?(1 point)
Responses
The reaction is reversible.
The reaction is reversible.
The reaction proceeds slowly.
The reaction proceeds slowly.
The reaction proceeds quickly.
The reaction proceeds quickly.
The reaction yields something.
Responses
The reaction is reversible.
The reaction is reversible.
The reaction proceeds slowly.
The reaction proceeds slowly.
The reaction proceeds quickly.
The reaction proceeds quickly.
The reaction yields something.
The correct response is:
The reaction yields something.
The forward arrow in a chemical equation indicates the direction of the reaction and signifies that the reactants are converted into products.
Which kind of reaction is photosynthesis?(1 point)
Responses
exothermic
exothermic
endothermic
endothermic
light-independent
light-independent
temperature-independent
Responses
exothermic
exothermic
endothermic
endothermic
light-independent
light-independent
temperature-independent
The correct response is:
endothermic
Photosynthesis is an endothermic reaction because it absorbs energy (in the form of sunlight) to convert carbon dioxide and water into glucose and oxygen.
Photosynthesis requires which kind of energy?(1 point)
Responses
light energy
light energy
heat energy
heat energy
mechanical energy
mechanical energy
thermal energy
thermal energy
Responses
light energy
light energy
heat energy
heat energy
mechanical energy
mechanical energy
thermal energy
thermal energy
The correct response is:
light energy
Photosynthesis requires light energy, which is captured by chlorophyll in plants to convert carbon dioxide and water into glucose and oxygen.
1 answer