What type of reaction is the following zn+> cu+znso4

decomposition
combination
single replacement
double replacement
neutralization

m=9

step-by-step explanation:

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2

answer///carbon;