A reaction vessel that is completely sealed and the Earth would be my answers. This is because the matter inside of these systems is not exchanged anywhere but inside itself. (the glass flask could count, but the not insulated thing might be why it doesn’t count)
Answer:
The number of carbon atoms is twice the number of magnesium atoms
Reactions can occur because of a precipitation reaction
<h3>Further explanation</h3>
Double-Replacement reactions, happens if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product
To predict whether this reaction can occur or not is one of them, the precipitation reaction. A precipitation reaction occurs if two ionic compounds which are dissolved reacted to produce one of the products of the ion compound does not dissolve. Formation of these precipitating compounds that cause reactions can occur
Chloride solution reacts with Sodium carbonate solution
CaCl₂(aq)+Na₂CO₃(aq)⇒CaCO₃(s)+NaCl(aq)
Because Calcium carbonate, CaCO₃ an insoluble solid , it will precipitates so that a reaction can occur
The most common types of radiation are alpha particles, beta particles, and gamma rays
