According to the law of conservation of matter, the number of is not changed by a chemical reaction. a. molecules b. atoms c. bonds d. products

Which is an example of a reversible physical change?

Which statement accurately represents the arrangement of electrons in bohr’s atomic model?

Pinene is an unsaturated hydrocarbon found in pine resin. if pinene has m+ = 136 and contains 1 double bond(s) and 2 ring(s); what is its molecular formula? enter the formula in the form ch first, then all other atoms in alphabetical order; do not use subscripts. the formula is case-sensitive