Which two categories can all substance be classified?

Which isotope is used to date ancient artifacts such as fossils?

A hydrate is a compound that has water molecules within its crystal structure. Magnesium sulfate heptahydrate, MgSO4·7H2O, is a hydrated form of magnesium sulfate. The hydrated compound has 7 moles of H2O for each mole of MgSO4. When 5.

What is the sea of instability

A teacher wants to preform a class room demonstration that illustrates both chemical and physical changes. which would be the best demonstration she could use

At birth, a lion cub is: Weak and dependent on its mother Strong enough to live on its own Able to get it's own food An exact copy of its mother

For the reaction hconh2 (g) ânh3 (g) + co (g), k = 4.84 at 400 k what can be said about this reaction at this temperature?

What would be the effect on the nucleus of an atom if it emitted one alpha particle and one gamma ray

What is the formula for lead (IV) sulfide

In solid KCl, which has the same solid state structure as NaCl (simple cubic unit cell), the distance between the ions is 314 pm. Calculate the length of the edge of the unit cell.

Planck's constant is approximately equal to which of the following? The product of the uncertainties in electron position and electron momentum. The sum of the uncertainties in electron position and electron momentum.