How much is a 1971 silver dollar worth in weight and in mint condition? 

This coin, regardless of condition, is worth at least its weight in silver. The silver melt value for this coin is $7.90 as of April 10, 2023. This melt value is calculated from the current silver spot price of $24.98 per ounce. The standard 1971 silver dollar is worth around $15 in MS 63 choice uncirculated condition.
Here are the key points about the value of a 1971 silver dollar:

Weight Value:
- The 1971 silver dollar contains 0.7734 troy ounces of pure silver.
- At the current silver spot price of around $24.98 per ounce (as of April 10, 2023), the melt/intrinsic silver value is around $19.32.
- So the absolute minimum a 1971 silver dollar is worth is its silver melt value of $19.32, regardless of condition.

Numismatic/Collector Value:
- In uncirculated mint condition (MS 63 grade), a 1971 silver dollar is worth around $15.
- The value increases for higher mint state grades - e.g. MS 65 can be $25+.
- Coins in circulated condition are worth less, usually just slightly above the $19.32 melt value.

So in summary, the melt/weight value of the silver is a minimum of $19.32 currently. But a 1971 silver dollar in mint uncirculated MS 63 condition is worth around $15 to collectors over the melt value.