How do catalysts affect a chemical reaction?(1 point)

Responses

lower activation energy
lower activation energy

provide activation energy
provide activation energy

lose activation energy
lose activation energy

increase activation energy

9 answers

The correct response is:

lower activation energy

What happens during rusting of an iron nail?(1 point)
Responses

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.
Iron and sulfur combine to form iron sulfide.

Iron and oxygen combine to form iron oxide.

The correct response is:

Iron and oxygen combine to form iron oxide.

What does the forward arrow in a chemical equation mean?(1 point)
Responses

The reaction proceeds quickly.
The reaction proceeds quickly.

The reaction proceeds slowly.
The reaction proceeds slowly.

The reaction is reversible.
The reaction is reversible.

The reaction yields something.

The correct response is:

The reaction yields something.

Which kind of reaction is photosynthesis?(1 point)
Responses

exothermic
exothermic

temperature-independent
temperature-independent

light-independent
light-independent

endothermic

The correct response is:

endothermic.

Photosynthesis requires which kind of energy?(1 point)
Responses

heat energy
heat energy

mechanical energy
mechanical energy

light energy
light energy

thermal energy

The correct response is:

light energy.

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