1. If a 12-karat-gold class ring has a mass of 11.2 g, how many metric tons of ore were
processed in order to produce the gold to
make the ring?

According to the tide table below what time of day will the highest tide occur?

This question is about electrolysis. metal spoons can be coated with silver. this is called electroplating. suggest one reason why spoons are electroplated?

Which of the following is in the lanthanide family? a) uranium b) promethium c) silver d) gold