Results: Volume EDTA
% Removed
Dose of Na2CO3
(mg/L)
Hardness
(mg/L as Caco:)
0
11.5
100
10
200
8.5
300
7
400
3 What is the discussion and conclusion of the graph?

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease. correct answer for apex - a, its nonpolar end dissolves the grease.

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world