Buoyant
Buoyancy is the ability to float in fluids.
Gravity is the force of all objects attracted to one.
Friction is the force caused when two objects rub against each other causing them to slow
<span>Archimedes principle explains that the magnitude of that force is proportional to the difference in the pressure between the top and the bottom of the column, and</span> is also equivalent to the weight of the fluid that would otherwise occupy the column, i.e. the displaced fluid.
Answer:
The rate of reaction rA is an intensive parameter.
Explanation:
The rate of reaction for a chemical species is typically -rA. Negative sign only shows that reactants are consumed when time is passing in the reaction.
Reaction rate will depend of several factors such as: Constant of equilibrium - K, Concentration of species - CA, Temperature - T and so on.
When we analyze the reaction rate the units are mol/Ls. It means that reaction rate will only depend of concentration and other variables. In this way, rate of reaction only is afected when we have changes in concentrations.
Concentration is an intensive parameter, it is not important if we have 100 kg or 100 L, or even 1 Kg or 1 L of total solution. Concentrations are the proportion of them and they will remain constant independent of the total mass or volume studied.
Due to the above, concentration and rate of reaction are intensive parameters and they do not depend of the total mass or volume studied.
Answer:
P₂ = 2.19 atm
Explanation:
Given data:
Initial volume = 1.5 L
Initial pressure =1 atm
Initial temperature = 273K
Final temperature = 26°C (26+273 = 299 K)
Final volume = 0.75 L
Final pressure = ?
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
P₂ = P₁V₁ T₂/ T₁ V₂
P₂ = 1 atm × 1.5 L × 299 K / 273 K × 0.75 L
P₂ = 448.5 atm .L. K / 204.75 K.L
P₂ = 2.19 atm
Answer:
19437 J
Explanation:
mass = 100 g
Initial Temperature = 23.5°C
Final Temperature = 70°C
Temperature change, ΔT = 70 - 23.5 = 46.5
Heat = ?
The parameters are related by the equation;
H = mc ΔT
where c = specific heat capacity = 4.18 J/g°C
H = 100 * 4.18 * 46.5 = 19437 J
Answer:
0.572
Explanation:
The formula for ammonium nitrate is
NH4NO3
The trick here is to realize the 4 applies only to the hydrogen. The 3 applies only to the oxygen.
There are 2 nitrogens in the formula. So if the entire molecule represents 0.286 mols. The individual mols of each part of the formula is just multiplied by the number of moles of the molecule. In formula form
Number of moles of the atoms making up the molecule = number of atoms from the formula * mols of the molecule.
2*0.286 = 0.572 moles of Nitrogen
