Geometric isomers occur in some alkenes. These isomers are called cis–trans isomers because of the spatial orientation of the atoms or groups of atoms attached to the two carbons that form the double bond. Select the pairs that are cis–trans isomers.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

here are some of the ways in which chemical and nuclear reactions differ.

explanation: