It is not a rock. It is a mineral which is mixed with copper and tin.
Tin and copper.
Copper is an element in and of itself - you can't "mix" any other substances to get it. Copper is mixed with zinc to make brass, or with tin to make bronze.
A solution is mixture that is very well-mixed. Bronze is a solution of copper and usually tin.
A solution of copper and tin is a mixture at the atomic leverl. No amount of optical magnification can reveal the different metals in the alloy. The mixture is a random arrangement of copper and tin atoms.
When people mixed Tin and Copper together.
Copper. Mixed with tin, it becomes bronze, and mixed with zinc, brass. You can see this for yourself by taking a shiny U.S. penny from 1984 or newer. Hold it in a flame (even a candle will do) and wait for a color change. Modern pennies are zinc with a little copper, so when heated, it becomes brass.
Ill answer them in order of how you asked, gold, silver, iron oxide mixed in a rock with various other minerals, copper and tin
When tin and copper are mixed together to form bronze, they change in that their product is much tougher and stronger.
When tin is placed into a magnesium sulfate solution, no reaction occurs since tin is lower in the reactivity series than magnesium. Tin does not displace magnesium from its salt solution.
To make bronze, smelt tin ore and copper ore.
Bronze is a mixture of copper and tin. Approximately 94% copper is used, and 6% tin. This is only the norm though, as slight differences in percentages up and down are used by different manufacturers.