The correct answer is A. A buffer is a substance that resists small change in the acidity of a solution when an acid or base is added to the solution. Usually, a buffer involves a weak acid or a weak alkali and one of its salt.
Answer: The particles need energy to overcome the attractions between them. As the liquid gets warmer more particles have sufficient energy to escape from the liquid. Eventually even particles in the middle of the liquid form bubbles of gas in the liquid.
Explanation:
The question is incomplete, the complete question is;
In a laboratory experiment, students synthesized a new compound and found that when 12.23 grams of the compound were dissolved to make 228.1 mL of a benzene solution, the osmotic pressure generated was 4.55 atm at 298 K. The compound was also found to be non-volatile and a non-electrolyte. What is the molecular weight they determined for this compound?
Answer:
287.76 g/mol
Explanation:
From;
π
=
M
R
T
M = molarity
R= gas constant
T = temperature
number of moles = π * volume/RT
number of moles = 4.55 * 228.1/1000/0.082 * 298
number of moles = 1.037855/24.436
number of moles = 0.0425 moles
Molar mass = mass/number of moles
Molar mass = 12.23 grams/0.0425 moles
Molar mass = 287.76 g/mol
Explanation:
A hydrogen atom is composed of a proton (including a neutron) and electron. In chemical reaction with Hydrogen, the atom can easily gain or lose its only electron in its 1s orbital shell to achieve stable electron configuration.
It can behave like alkali metals when it loses its valence electron in its outermost orbital shell in a reaction. An example is just like metals, it can react with non-metals like chlorine (to form HCl).
Hydrogen can also act as a non-metal and gain an electron in its outermost valence shell to achieve stable electron configuration of 1s². This way it can behave like a halogen. It can react with metals such as Sodium to form a NaH (Sodium Hydride).
Learn More:
For more on Hydrogen structure check out;
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