What is the estimated age of a tree with 6 dark rings and 6 light rings?

12 years old
3 years old
4 years old
6 years old

Sylvanite is a mineral that contains 28.0% gold by mass. how much sylvanite would you need to dig up to obtain 77.0 g of gold? explain how you got your answer and the steps you took. you

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

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?