c - the molarity, n - the number of moles, V - the volume of the solution
First calculate the number of moles of AgNO₃ in the solution.
The volume is
.
The molarity:
.
The molarity is
0.016 mol/L.
Answer:
76 ml
Explanation:
The complete question is attached in the image.
The volume of a liquid is the amount of space that the liquid occupies or contains. Since for a liquid, it takes the shape of the container, when measuring the volume, we just measure the space occupied by the liquid in the container.
From the image, when determining the volume, we are to use the value of the lower meniscus. Hence the volume of the liquid is gotten to be 76 ml
Early in the 20th century scientists realised that all matter is made up of atoms. As a result of an experiment carried out by his assistants, Hans Geiger and Ernest Marsden, Ernest Rutherford suggested a model for the atom. The experiment is known as Rutherford's alpha particle scattering experiment.
Answer:
The answer to your question is letter D
Explanation:
Data
mass of Li = 4.5 g
mass of N₂ = 4.5 g
limiting reactant = ?
Reaction
6Li (s) + N₂ (g) ⇒ 2Li₃N
This reaction is balanced
Process
1.- Calculate the molecular mass of the reactants
Li = 7 x 6 = 42g
N = 14 x 2 = 28 g
Calculate the limiting reactant using proportions
Theoretical proportion Li / N = 42 / 28 = 1.5
Experimental proportion Li/N = 4.5/4.5 = 1
As the experimental proportion was lower than the theoretical, the limiting reactant is Lithium
2.- Calculate the theoretical yield of Li₃N
42 g of lithium -------------- 70 g of Li₃N
4.5 g of lithium ------------- x
x = (4.5 x 70) / 42
x = 315 / 42
<u> x = 7.5 %</u>
Answer:
lower
Explanation:
For a spontaneous process, the standard Gibbs free energy change has to be less than zero:
∆G° < 0 → spontaneous
∆G° > 0 → non- spontaneous
∆G° = 0 → system is at equilibrium
For a negative change in standard Gibbs free energy, the Gibbs free energy of the products has to be lower than that of the reactants since Gibbs free energy change is the standard Gibbs free energy of products minus that of the reactants.
Mathematical derivation:
G°(products) -G°(reactants) < 0
G°(products) < G° (reactants)
✩ Note that in the image attached, the Gibbs free energy change is usually denoted by a single-headed arrow, from reactants to products.
What is free energy?
- the amount of energy available to do useful work
- it tells us the spontaneity of a chemical process
Standard state conditions
- You may have noticed the superscript ° after the letter G (which stands for Gibbs free energy), and this symbol denotes standard state.
- implies that the pressure of a gas is 1 atm
- implies that for a solute, its concentration is 1M
Spontaneity
- the ability of a reaction to occur without outside intervention
- For example, an ice melting in a cup of hot tea is a spontaneous process (i.e. the transfer of heat from a hotter object to a cooler object is spontaneous).