1. A student tried to solve the following problem by selecting the tile as shown. What, if anything,
2AgNO3 (aq) + Cu (s) — 2Ag (s) + Cu(NO3)2 (aq)
How many moles of silver nitrate (AgNO3) are
needed to produce 6.75 moles of copper (II) nitrate
(Cu(NO3)2) upon reacting with excess copper (Cu)?
6.75 mol Cu(NO3)2
1 mol Cu(NO3)2
2 mol AgNO3

Not sure sorry

Explanation:

idk

explanation:

dasdad

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e