After 42 days a 2.0 g sample of phosphorus-32 contains only 0.25 g of the isotope. What is the half-life of phosphorus-32?

The relative strengths of covalent bonds and van der Waals interactions remain the same when tested in a vacuum or in water.

Describe the information that fossils can provide. What is the difference between relative dating and absolute dating? Describe two major biological developments of the Mesozoic era. Describe the contributions of Hutton and Lyell.

Radioactive decay Question 6 options: is a spontaneous process. occurs when an unstable nucleus loses energy. does not require any input of energy. all of the above

True or false only moving things have energy?

Which is a property of both alkenes and alkynes?

Which is an example of flow of heat through conduction

Which of the following is an extensive physical property of matter? volume viscosity odor density

When is Ksp determined for a system?

What is the average surface temperature of Uranus

Consider the following statements. A. Molecules of hot water have less kinetic energy than those of cold water. B. For most solids, solubility increases when temperature increases. C.