Tritium (half life = 12.3 y) is used to verify the age of expensive brandies. If an old brandy contains 1/16 of the tritium present in the new brandy, then how long ago was it produced

Which of the following is not included in John Dalton's modern theory of the atom? A. Atoms cannot be destroyed or divided up any further. B. The atoms that make up an element are identical to each other C.

What is gallium oxide + calcium?

Nitric acid + mg (no3) 35.0 ml of 0.255 m nitric acid is added to 45.0 ml of 0.328 m mg (no3) 2. what is the concentration of nitrate ion in the final solution? a. 0.481 m b. 0.296 m c. 0.854 m d. 1.10 m e. 0.0295 m

On a test, Helena is defining energy. Which must she include in order to get her answer marked correct? making objects more compact the ability to do work carrying through matter and space the bonds of atoms

Which option is a solution that is 20% (v/v) methanol in water?

How does the quantity of atp produced as a result of activity by the electron transport chain compare to the quantity produced as a result of glycolysis?

Molybdenum has a molar mass of 95.94g/mol. How many molecules of molybdenum are in 150.0 g of molybdenum

Describe a way that people might be able to solve each envioronmental problem listed below. coal mining can harm habitats and cause pollution.

A sample of methane gas occupies 4.50 gallons at a temperature of 80.0 F. If the pressure is held constant, what will be the volume of the gas at 100. degrees C?

Jack wants to know if it takes longer for warm water to freeze into ice cubes than cold water, so he performed the following experiment. Jack placed 50 mL of water in the refrigerator and allowed it to cool to a temperature of 4°C.