Answer:
Sal: Pure substance
Agua: Pure substance
Agua de limón: Homogeneous mixture
Refresco con gas: Heterogeneous mixture
Arroz: pure substance
Frijoles: pure substance
Frijoles con caldo: heterogeneous mixture
Step-by-step explanation:
Pure substances consist of only one element like water, salt, beans, etc. If we mix two elements and we can not distinguish them separately, we have a homogeneous substance that is made of one phase like in the case of lemon and water, but if we mix two elements and we can distinguish them separately in the mixture we have a heterogeneous mixture with two phases, an example would we beans and water.