How do catalysts affect a chemical reaction?
lose activation energy
provide activation energy
increase activation energy
lower activation energy***
What does the forward arrow in a chemical equation mean?
The reaction is reversible.
The reaction proceeds quickly.
The reaction yields something.***
The reaction proceeds slowly.
Which kind of reaction is photosynthesis?
endothermic***
light-independent
exothermic
temperature-independent
Photosynthesis requires which kind of energy?
thermal energy
mechanical energy
light energy***
heat energy
What happens during rusting of an iron nail?
Iron and sulfur combine to form iron sulfide.
Sulfur and oxygen combine to form a sulfur dioxide coating.
Iron and oxygen combine to form iron oxide.***
Sulfur, iron, and oxygen combine to form iron sulfoxide.
11 answers
C
A
B
C
quicker way to cheat :)
1.a {lower activation energy}
2.d {Iron and oxygen combine to…}
3.d {The reaction yields something}
4.d {endothermic}
5.c {light energy}
10 answers