You have a stock solution of 4.0 M of potassium nitrate. You need 50.0 mL of 0.20 M potassium nitrate. What volume of 4.0 M solution is required to make the amount of 0.20 M solution you need?

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

What material does not melt at any temperature

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.