Which statement is true for chemical reactions but not for nuclear reactions? A. The chemical bonds between atoms are unchanged.
B. The reactions convert some mass into energy.
C. The nuclei of the atoms involved stay the same.
D. The products contain less total mass than the reactants.

Jewelweed, a flowering plant, has seed pods that burst open when touched and forcefully eject their seeds. these structures are favorable because they a. can cause genetic changes to occur. b. prevent germination within the seed pod. c. aid in the dispersal of the species. d. attract insects that aid in pollination.

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.