Answer:
It is the last one.
Explanation:
Water molecules are polar, they have cohesive properties, and water is less dense when it is solid than when it is a liquid, that is why ice floats in liquid water. However, water is a very good solvent, it can dissolve many solids, including sugar, salt, and other hydrophilic substances.
The product of the reaction between lithium hydroxide and hydrofluoric acid is
lithium fluoride (LiF) and water(H₂O)
<u><em>Explanation</em></u>
Base react with acid to form salt and water.
Lithium hydroxide( <em> a base</em>) react with hydrofluoric acid (<em> an acid</em>) to produce lithium fluoride( <em> salt)</em> and water according to reaction below
Answer:
At high altitude, it takes longer to cook spaghetti. (Ans 2).
Explanation:
A colligative property of a solution depends on the number of ions or solute particles present in the solution, not the type of the solute. Due to pressure change boiling points have nothing to do with colligative property and solutions.
Colligative properties include:
1) Freezing point depression.
2) Vapor pressure lowering.
3) Boiling point elevation.
4) Osmotic pressure.
At high altitude, the air is under less atmospheric pressure than it is at sea level. So at high altitude, it takes longer to cook spaghetti, because of the water it boils in is not as hot as is it at sea level.
Answer:
The formal charge for H,O,F,O = 0 ,0 , 1, -1
Explanation:
The octet of electrons acquired by oxygen and fluorine atoms in this structure and the formal charges add to zero.Assigning of a formal charge +1 to an electro-negative atom as fluorine indicates that a structure does not occur .Fluorine normally forms one oxyacid HOF.