Time (min)
Rate of
Diffusion for
1 Crystal
(mm/hr)
Rate of
Diffusion for
3 Crystals
(mm/hr)
Rate of
Diffusion for
6 Crystals
(mm/hr)
0-10
I
0-20
0-30
Rate (mm/h] = (diameter [mm] / time [min]) x 60 [min]
How to Measure

answer; i believe the correct answer is (c) /// is a homogeneous mixture of gaseous substance nitrogen,oxygen and smaller amounts of other substancesmixtures can be either ( homogeneous or heterogeneous)plz check first good luck

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

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.