I think the correct answer from the choices listed above is option 2. When the products of a reaction are hotter than the reactants the reaction is endothermic. The change in temperature is a measure of energy difference of the states. Since energy must be conserved, so there must be a source of energy for the system.
The sand will be filtered and separated from the water, the sand will stay in/on the filter paper and the water will pass through the filter paper into the flask.
As a debate kid, the purpose of the source is to provide evidence on a point. You are proving that your point matters by giving a piece of evidence that supports what you’re trying to say. Without evidence your claim isn’t impactful.
Answer:
Na⁺ Cl⁻
Explanation:
Sodium form cation by losing one electron and chlorine form anion by accepting one electron. Both form ionic compound sodium chloride.
Ionic bond:
It is the bond which is formed by the transfer of electron from one atom to the atom of another element.
Both bonded atoms have very large electronegativity difference. The atom with large electronegativity value accept the electron from other with smaller value of electronegativity.
For example:
Sodium chloride is ionic compound. The electronegativity of chlorine is 3.16 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the chlorine. Sodium becomes positive and chlorine becomes negative ion.
Answer: i think that it was 800 mg
Explanation: