Question

Photosynthesis is ___________ reaction, because it needs sunlight to proceed.
A. an exothermic
B. an electric
C. an endothermic
D. a combustion

Answer 1

C

Answer 2

thanks!!

Answer 3

Which of the following takes place during a single displacement reaction?
A. a complex substance breaks down into two or more simple substances B. a single substance replaces another substance in a compound C. two simple substances combine to form a new complex substance D. parts of compounds switch places to form two new compounds
?

Answer 4

For sure C

Answer 5

for the first question

Answer 6

like a simple substance like NaCl +Mg2+=Mg(Cl)2 +Na+
this is a single displacement i would say B for the second one