Bir elementin atomlarının %92,21 inin kütlesi 27,97693 akb, %4,70 inin kütlesi 28,97649 akb ve %3,09 unun kütlesi 29,97376 akb ise elementin ortalama atom kütlesi nedir hesaplayınız? (

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

did anyone actually do this? like if anyone has submitted this i rly need .

c (diamond),

sio2 (quartz)

wher is the rest of the question