A sample contains 25% parent isotope and 75% daughter isotopes. If the half-life of the parent isotope is 72 years, how old is the sample?

Bromine gas in a container is heated over a flame. What happens to the average kinetic energy of the bromine particles? A.) It decreases rapidly. B.) It increases quickly. C.) It remains the same. D.) It decreases slowly.

The temperature at which the reaction is occurring is increased

Which occurs during digestive

What are the SI base units for : mass length time and volume

Do you think it is likely that a major volcanic eruption will occur on the mainland of the United States

Chemical reactions that release energy possess reactants with lower energy than their products. True or False Heat is the most common form of energy absorbed or released in chemical reactions. True or False

What is the reason for the low solubility of LiF (0.27 g per100 ml H2O) compared to CsF (367 g per 100 ml H2O) ?

Which of the following changes will decrease the total amount of gaseous solute able to be dissolved in a liter of liquid water? A.) increasing temperature B.) increasing pressure C.) decreasing surface area D.) decreasing temperature

In June there are fewer hours of daylight and less direct sunlight in the

What are two type of minerals?