Final answer:
Without reaction evidence or conditions for the MnO₂ and Al reaction, we cannot confidently provide the compound formed from the combination of 48 grams of manganese dioxide and 20 grams of aluminum.
Step-by-step explanation:
The combination of 48 grams of manganese dioxide (MnO₂) and 20 grams of aluminum (Al) suggests a reaction involving these two reactants. However, the question seems to be missing either the actual reaction conditions or additional information that would allow us to deduce the exact product formula.
Commonly, in thermite reactions, aluminum is used to reduce another metal oxide because of its high affinity for oxygen. For instance, the reaction of aluminum with iron oxide (Fe₂O₃) leads to the formation of aluminum oxide (Al₂O₃) and metallic iron (Fe).
However, without the reaction evidence or conditions for the MnO₂ and Al reaction, we cannot confidently provide the compound formed from the combination given. Therefore, it is important to access full reaction details or context for an accurate response.