3. 6.02 x 10^23 atoms of At
Please provide more of the question so I am able to answer, but I do know that H20 has 0 calories.
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:
A.PbCl2
C.Cl2
Explanation:
are the products in the given chemical reaction.
Hope it helps you in your learning process
That would be c, the alveoli.
