A standard of measurement system is important because it allows scientists to compare data and communicate with each other about their results.
Answer:
400 K
Explanation:
Charles's law states:
A determined volume of a gas is directly proportional to its temperature, while we have constant pressure.
V₁ / T₁ = V₂ / T₂
We replace data:
5 L / 100K = 20L / T₂
T₂ = 20L . 100K / 5 L
T₂ = 400 K
The volume was quadrupled, so the temperature did.
If we want T° at Celsius degree:
400 K - 273 = 127°C
Answer:
The given statement is true.
Explanation:
Strong acids and bases act as strong electrolytes.They undergo complete dissociation in an aqueous medium to generate cations and anions.
For example HCl ⇄ H+ + Cl-
Hydrochloric acid is a strong electrolyte,it undergo complete dissociation in an aqueous solution to generate H+ ion and Cl- ion.
On the other hand acetic acid is a weak acid and act as weak electrolyte.In aqueous solution acetic acid under partial dissociation to form acetate anion and proton.
CH3COOH ⇄ CH3COO- + H+
I think the correct answer would be the first option. It is the solid phosphorus (P4) that will be the softest among these crystals. P4 is held by covalent bonding or sharing of electrons between atoms while ZnS, CuCl and SiO2 are being held by ionic bonding. Covalent bonding involves the overlapping of orbitals while ionic bonding has separation of the charges. Although covalent bonding is a strong type of bond, ionic bonding is much stronger as compared to the former. Being stronger, the compounds mentioned above with this type of bonding would tend to be harder than phosphorus which has covalent bonding only.
