15.c
16.the law of conservation of mass state that mass in a isolated system is niether created or destroyed.
17.you can prove that dissolving salt is a physical change by evaporating the water to separate the two.
Answer:
D
Explanation:
When substrate molecules bind to the active site of the enzyme, the enzyme undergoes a slight change in shape.
You can find it in rainforest because they like damp places.
Answer:
Reaction rate, in chemistry, the speed at which a chemical reaction proceeds. It is often expressed in terms of either the concentration (amount per unit volume)
Explanation:
Answer:
the unknown substance is a protein
Explanation:
The biuret test is one of the tests for proteins. It can be used to detect peptide linkages. The biuret test is carried out in an alkaline solution. A coordination complex is formed leading to the appearance of a violet color.
Summarily, the biuret method is a colorimetric technique used to test for proteins and peptides. It involves the formation of a purple (violet) complex of Copper salts in alkaline solution.
Hence when the biuret reagent is added to an unknown substance and it turns purple, the unknown substance is a protein
