C I believe if I’m wrong I’m sorry but it’ll be c
Answer : B) In step 2, there was a chemical change which was observed in sugar.
Explanation : In A step 2 there was a physical change that was seen. By just boiling the dissolved salt solution salt was obtained. Therefore, it is a physical change. In B step 2 there was a chemical change seen as sugar solution was thickened and turned brown. It was not obtained in its original form; there was a chemical reaction that took place during sugar evaporation. As chemical change is the one where the reaction is irreversible.
Therefore only in B step 2 there was a chemical change that was observed.
Answer:
four subunits
Explanation:
Hemoglobin is made up of four subunits and can bind up to four oxygen molecules. Carbon dioxide levels, blood pH, body temperature, environmental factors, and diseases can all affect oxygen's carrying capacity and delivery
I think if u add water it will separate them i think not for sure