He ability to rust is a chemical property of iron. The metal silver does not rust, but eventually a darker substance called tarnish forms on its surface. The chemical properties of copper cause it to become a blue-green color when it is exposed to air
I reckon the answer is orbital electrons but we learn it as delocalised electrons in the UK (they are able to move between shells freely and can carry a charge)
Answer:
It is an example of a precipitation reaction. Soap contains the conjugate bases of fatty acids, and these anions (carboxylates of fatty acids) tend to form insoluble salts with magnesium and calcium cations.
Explanation:
Usual soaps are made by a reaction called saponification, in which triglycerides (which are the main components of animal and vegetal fats and oils) react with a strong base (like KOH or NaOH), breaking the triglyceride into three fatty acid conjugate bases (carboxylates) and a molecule of glycerol.
These fatty acid conjugate bases are formed by a long saturated carbon chain and an ionised tip (i attached the structure of a generic fatty acid carboxylate). These anions form very insoluble salts with Calcium of Magnesium cations, and thus a precipitate is formed, therefore the answer is B.
Answer:
0.39 mol
Explanation:
Considering the ideal gas equation as:
where,
P is the pressure
V is the volume
n is the number of moles
T is the temperature
R is Gas constant having value = 0.0821 L.atm/K.mol
At same volume, for two situations, the above equation can be written as:-
Given ,
n₁ = 1.50 mol
n₂ = ?
P₁ = 3.75 atm
P₂ = 0.998 atm
T₁ = 21.7 ºC
T₂ = 28.1 ºC
The conversion of T( °C) to T(K) is shown below:
T(K) = T( °C) + 273.15
So,
T₁ = (21.7 + 273.15) K = 294.85 K
T₂ = (28.1 + 273.15) K = 301.25 K
Using above equation as:
Solving for n₂ , we get:
n₂ = 0.39 mol
Rayleigh waves (which are a type of surface wave) produce the largest amplitude and so most severe ground movements during earthquakes.
Surface waves produce the most severe ground movements. They produce movements similar to waves in the water, where the water's particles move in a pattern that is almost circular. They move more slowly then P waves or S waves.