If it's for study island it's A.The effect is unpredictable because the ice changes two variables at the same time.
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:
Just ask google for help
Explanation:
I always do it and get it right
Answer:
589.8 kJ/mol
Explanation:
Let's consider the process in which <em>the most loosely bound electron from each atom in a mole atom of gaseous calcium is removed.</em>
Ca(g) + Energy ⇒ Ca¹⁺(g) + 1 e⁻
The energy involved in this process is known as First Ionization Energy. The First Ionization Energy for calcium is 589.8 kJ/mol.