Roger made a mixture of salt and sand.Which of the following procedures explains the easiest way to separate the mixture?
A.Pour the mixture into a glass of water and stir it until the salt dissolves.Pour the micture through a filter.Evaportate the water.
B.Pour the mixture onto the floor.Drag a magnet through a mixture.
C.Put the mixture in a pan.Heat the pan until the sand melts.Let the mixture cool.
D.Spread the mixture into a thin layer.Pick out the tiny pieces of sand using a pair of tweezers.
A?
Ah, now think a minute. Which do you think might work. The three that do not work are ridiculous.
I'm sure glad it isn't B or D!
Yes, A is the right answer.
true or false ?
All Substances are made of atoms of one or more different Elements
& can you please give more info on it (:
No, option A is not the correct answer.
The easiest way to separate a mixture of salt and sand is by using option B: Pour the mixture onto the floor and drag a magnet through it. This is because salt is a soluble substance, which means it will dissolve in water, whereas sand is not magnetic and will not be attracted to a magnet. By dragging a magnet through the mixture, the magnet will attract any iron-containing impurities or small magnetic particles, leaving behind the sand. Similarly, you can separate iron-containing impurities from a mixture of iron and sand using a magnet.
Option A is not the correct answer because it suggests dissolving the salt in water. However, if the mixture contains sand, it will not dissolve in water. Filtering the mixture after dissolving the salt will only separate the dissolved salt from the sand, but it will not separate salt from sand as a whole.
Options C and D are also incorrect. Sand does not melt at normal temperatures, so heating the mixture in a pan would not separate salt and sand. Similarly, manually picking out tiny pieces of sand using tweezers would be a time-consuming and inefficient method.