Plant is complex biological organism which is composed of many organic molecules that fulfill different roles in the plant, some will give the color of the plant, some are "energy reactors" like chlorophyll which capture the photons for promoting certain chemical reactions. Now the organic solvents like acetone and ethyl alcohol do not discriminate between the compounds so the solvent will extract many different molecules from the plant. The extract will be definitely a heterogeneous one.
Using a thin lay chromatography plate you may determine the spots for each organic compound as well as their retention factor for the solvent used as eluent. After concentration the solution, under vacuum, the mixture may be loaded in a chromatography column, previously filled with silica gel as stationary phase. After the elution and collection of each fraction, that contain a different molecule, the plant extract is separated.
Answer:
57.48%
Explanation:
Calculate the mass of 1 mole of malachite:
MM Cu = 63.55
MM O = 16.00
MM H = 1.01
MM C = 12.01
A mole of malachite has:
2 moles of Cu
5 moles of O
2 moles of H
1 mole of C
MW Malachite = 2*MM(CU) + 5*MM(O) + 2*MM(H) + 1 *MM(C)
MW Malachite = 2*63.55 + 5*16.00 + 2*1.01 + 1*12.01
MW Malachite = 221.13
Mass of Cu in a mole of Malachite = 2*MM(CU) = 127.1
Now divide the mass of Cu by the mass of Malachite
I just got this question and it was lipids sorry if i’m wrong
If the mass of both the reactants is 10kg then the mass of the products also equals 10kg.
It is due to the law of conservation of mass.
Mass can neither be created nor be destroyed.
Answer:
See Explanation
Explanation:
Wind is a renewable source of energy widely used as a source of energy in order to minimize the pollution that results from some other sources of non renewable energy.
Wind energy has the advantage of;
1) being a renewable source of energy hence it can be reused and it is not easily depleted.
2) it does not lead to any form of environmental pollution.
On the other hand, a lot of space is required in order to mount as many windmills as possible in order to generate enough electricity to serve a large area. Thus, the disadvantages of wind energy are;
1) A large expanse of land is required in order to generate a meaningful quantity of energy.
2) The occurrence of wind is inconsistent hence generation of energy is not steady.
