False. At equilibrium, the rate of forward reaction is equal to the rate of backward reaction. The net concentration of both products and reactants won't change, but the reactions still take place.
Answer:
Explanation:
1.
Given parameters:
Number of moles of CaO = 0.22moles
Unknown:
Mass of CaO = ?
Solution:
Mass, number of moles and molar mass are related using the expression below;
Mass = number of moles x molar mass
Molar mass of CaO = 40 + 16 = 56g/mol
Insert the parameters and solve;
Mass = 0.22 x 56 = 12.32g
2
Given parameters:
Number of moles of NaCl = 0.83moles
Unknown:
mass of NaCl = ?
Solution:
Also,
Mass = number of moles x molar mass
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
Now insert the parameters and solve;
mass = 0.83 x 58.5
mass = 48.6g
3.
Given parameters:
Number of moles of H₂SO₄ = 0.5moles
Unknown:
mass of H₂SO₄ = ?
Solution:
Mass = number of moles x molar mass
Molar mass of H₂SO₄ = 2(1) + 32 + 4(16) = 98g/mol
Insert the parameters and solve;
Mass = 0.5 x 98 = 49g
Answer:
T = 11.4°C
Explanation:
Given that:
weight of solute w (glucose) = 12 g
weight of solvent W (acetic acid) = 50 g
Molar depression constant of solvent (Kf)= 3.90°C/m
Temperature of solvent freezing point T₀ = 16.6°C
Temperature of solution freezing point Tₓ = (T₀ -T) = ???
Molar mass of solute (glucose) = 180.2 g/mol
Using the expression;
(T₀ -T) = 
-T = -16.6 °C + 5.2 °C
- T = -11.4°C
T = 11.4°C
∴ The freezing point of the solution is said to be = 11.4°C
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation.
It depends on mass and velocity.
In this case as the ice is solid its particles are stationary that it have zero velocity hence its kinetic energy is too zero.
Answer:option a
