To obtain solid NaCl from this mixture, the student should Remove the sand by filtration, then evaporate the water we will get the solid NaCl from the mixture. ( Option 1 )
<u>Explanation:</u>
The mixture contains solid NaCl and sand, in which the sand gets settled down at the bottom of the container, whereas solid sodium chloride (NaCl) gets dissolved in the water.
- We have to first separate the sand by means of a common purification method known as filtration.
- Followed by Filtration of sand we must then filtrate must contain the solution of NaCl, which can be separated by evaporating the solution.
- On evaporation, we will get the crystals of NaCl in the purest form.
Thus we can conclude option 1 as correct answer.
Answer:
Boron and/or Polonium
Explanation:
In the periodic table, you can see a stair-stepped line starting at Boron (B), atomic number 5, and going all the way down to Polonium (Po), atomic number 84. Except for Germanium (Ge) and Antimony (Sb), all the elements to the left of that line can be classified as metals.
Molar mass of C3H8 = C 3 (12.01 g/mol) = 36.03 (g/mol)
H 8 (1.008 g/mol) = 8.064 (g/mol)
44.09 (g/mol)
74.6 g propane x 1 mole propane x 6.022 x 10
23
molecules
44.09 g propane 1 mole propane
= 1.02 x 10
24 molecules propane