7. A precipitate is formed when aqueous NaCl is added to which solution below? a. Ba(NO3)2
b. Pb(ClO3)2
C. (NH4)2CO3
d. CuSO4

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

Will mark brainliest how many electrons can be held in the energy level n = 4?

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel