Two different isotopes of the same element have : (t/f)

- Equal nuclear charges

- Similar radioactive decay properties

- Equal mass of an atom

- Different number of neutrons

- Equal mass of a nucleus

Which is one way that Dalton's atomic theory has been shown to be incorrect? Some atoms of a particular element are identical to atoms of other elements. Atoms can be destroyed by chemical reactions. Atoms can change identity in chemical reactions.

9 meters equal how many feet

Why should pyrotechnicians worry about the yield of the reactants in a firework? How does the yield affect the firework and the environment?

Consider this equilibrium: N2 (g) + O 2 (g) 2NO (g). Nitrogen gas and oxygen gas react when placed in a closed container.

4. You are preparing 250 mL of gel mix for protein electrophoresis, which requires a final concentration of 1.6% SDS. The lab has a 10% stock solution of SDS.

Which compound is formed from its elements by an exothermic reaction at 298 K and 101.3 kPa?

Energy can be transformed from one form to another. The diagram shows one such process. Which energy transformation is represented in the diagram?

Mathematically define heat capacity with equations.

If a cube has a volume of 2cm3 and amass of 12.8 grams what is its density

A noncompetitive inhibitor. binds to the active site of an enzyme a. b. increases the rate of enzyme action alters the primary structure of the enzyme c. d. none of these