Something breaking is a sign of what kind of change?

A) physical only

B) chemical only

C) physical and chemical

What is the final volume of NaOH solution prepared from 100.0 mL of 0.500 M NaOH if you wanted the final concentration to be 0.150 M?

How do alkali metals differ from alkaline earth metals in atomic structure and general properties?

Caffeine contains hydrogen, carbon, nitrogen, and oxygen atoms in a fixed ratio. is it a mixture or compund

How many moles of gold atoms are in 2.8 x 10 21 atoms of gold?

What does Bohr's model of the atom resemble the most?

Determine the number of protons, electrons, and neutrons for cobalt with a charge of + 6 and a mass of 61.

Which of the following is false about a spontaneous chemical reaction that generates electricity:a. Oxidation and reduction half-reactions occur at electrodes in electrochemical cells. b.

What change would you expect on the rate of theSN2 reaction of 1-iodo-2-methylbutane withcyanide ion if the nucleophile concentration isunchanged and the alkyl halide concentration isdoubled?

The nuclear reaction that occurs by combining two or more lighter atoms into a larger one is called what? a. nuclear fusion b. nuclear fission c. beta emission d. alpha emission

Though energy can change forms, the total amount of energy in the universe remains constant. True or false