Chemical change, because the white powder heated the water and caused a thermal reaction, and possibly gas was produced due to bubbles.
That would be <span>Johannes Gutenberg a German inventor from the 1400's </span>
Pretty sure its all of the above since all of them are true
Carbon has a tendency to form covalent bonds.
In an alkene, cis and trans isomers are possible because the double band is rigid, cannot rotate, has groups attached to the carbons of the double bond that are fixed relative to each other, and only occurs with double bonds-possibility that molecule will have different geometries; two different molecules with slightly different properties.
-Trans-2 ends of chain across the double bond.
While naming Cis-Trans isomers the prefix cis or trans are placed in front of the alkene name when there are cis-trans isomers.
