Which criteria are responsible for deciding whether a heterogeneous mixture is a colloid or a suspension? A.
whether its composition is uniform and transparent
B.
whether the particles remain suspended for an extended period of time
C.
whether it can be separated into simpler substances through physical separation techniques
D.
whether the ratio of components is fixed

C.

whether it can be separated into simpler substances through physical separation techniques

Explanation:

A heterogeneous mixture is colloidal if

A heterogeneous mixture is suspension if

So, the criteria are responsible for deciding whether a heterogeneous mixture is a colloid or a suspension is "whether it can be separated into simpler substances through physical separation techniques".

So, the correct answer is "c".

its first and third is your answer i did the qustion the fourth isnt right

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.