When analyzed by tlc, a compound exhibited an rf value of 0.48 when diethyl ether was utilized as the developing solvent. in this analysis the solvent was allowed to travel a distance of 7.8 cm up the plate. if the solvent had been allowed to travel 11.3 cm up the plate how high up the plate would the compound have traveled?

5.4 cm

Explanation:

The Rf value can be calculated using the formula

Rf = A/B

Where A is the distance travelled by the compound, and B is the distance traveled by the solvent. If the compound and the developing solvent remain the same, the Rf value does not change, no matter the dimensions of the plate or how long the solvent was allowed to travel.

As such, we're left with Rf = 0.48 and B = 11.3 cm, so now we solve for A:

0.48 = A / 11.3

A = 5.4 cm

- decrease the number of plants and animals living in the water.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-