What is nickel and dimes in a box mixture or pure substance?

Answer 1

mixture. nickel and dimes are made of different elements. If they were melted together, at a chemical scale and bonded, they would be a compound. As they are mixed together, but not bonded, they are a mixture. And dont forget the air in the box too, that adds to the mixture.

Answer 2

Nickel and dimes in a box are a heterogeneous mixture because you can see and separate the individual components. Nickel and dimes retain their individual properties and can be physically distinguished in the box.