4. Given the data shown, what two substances does the unknown mixture contain? Substance Appearance

Vinegar

Litmus

(ph)

R-B Base

B-R Acid

Biuret

(protein)

lodine

(starch)

Powder

0

+

Baking

Powder

Baking

Soda

Corn

Starch

Powder

Base

+

Powder

0

Gelatin

Crystal

Acid

+

Salt

Crystal

0

Unknown

Acid

Crystal

& Powder

Mixed

Mixed

A. Gelatin and baking powder

B. Gelatin and baking soda

C. Gelatin and corn starch

D. Salt and corn starch

the answer is b & c i believe : )

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.