I believed the right answer is “A, Mixed” but i’m not too sure
Explanation: For the given acid-base reaction, The molecular equation is:
Molecular equation: 
As we know, 
is a strong acid, so in the ionic equation, it will completely dissociate into its respective ions.
The ionic equation for the given acid-base reaction is given by:
As nitrate ions are present on both the sides, so in the net ionic equation, it will get cancelled out, then the net ionic equation becomes:
Net ionic equation: 
Photosynthesis supports the Law of Conservation of Matter/Mass and Energy because it isn't destroying matter or energy, the process of photosynthesis is simply converting matter into a usable form of energy which, in this case, is ATP.
Answer:
B. what happens when iron rusts in the presence of water
Explanation:
Chemistry is a branch of science involving the composition and changes of matter. In other words, a chemist, who is a trained specialist in the science of chemistry, seeks to answer questions related to properties of matter.
In this question, a chemist is most likely to study "what happens when iron rusts in the presence of water" because it involves a change in the chemical properties of a substance (iron) i.e. a chemical change. However, what happens when ice melts to liquid water is a physical change.
I think the awnser is a not sure though
