This year course engages students in becoming skilled readers of prose written in a variety of periods, disciplines, and
rhetorical contexts and in becoming skilled writers who compose for a variety of purposes. More immediately, the course
prepares the students to perform satisfactorily on the A.P. Examination in Language and Composition given in the spring.
Both their writing and their reading should make students aware of the interactions among a writer’s purposes, audience
expectations, and subjects as well as the way generic conventions and the resources of language contribute to effectiveness
in writing. Students will learn and practice the expository, analytical, and argumentative writing that forms the basis of
academic and professional writing; they will learn to read complex texts with understanding and to write prose of
sufficient richness and complexity to communicate effectively with mature readers. Readings will be selected primarily,
but not exclusively, from American writers. Students who enroll in the class will take the AP examination.
the states of the reactants and products
the temperature and pressure at which the reaction was carried out
the relative amounts of reactants and products
the type of catalyst that is used to speed up the reaction
whether the reaction can go in both directions
Explanation:
A chemical equation is an equation that shows how the reactants are combining together to give the products.
The following are the information to include when writing a chemical equation;
- the states of the reactants and products
whether solid, liquid or gases or aqueous, It is usually appended as a subscript in bracket
- the temperature and pressure at which the reaction was carried out
this shows the condition under which the reaction was carried out. It also gives useful information that can be used to quantitatively determine heat changes in a reaction.
- the relative amounts of reactants and products
this is usually derived from the balanced equation. They are the numbers appended at the beginning of the species in the equation
- the type of catalyst that is used to speed up the reaction
it is a good practices to provide the information about the catalyst used.
- whether the reaction can go in both directions
→ signifies one direction
⇔ both directions
learn more:
Chemical equation brainly.com/question/2924195
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Answer: The four
hybridized orbitals on Sb makes up the sigma bonds between Sb and F in antimony(iii) fluoride ,
Explanation:
According to VESPR theory:
Number of electrons around the central atom : ![\frac{1}{2}[V+N-C+A]](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%5BV%2BN-C%2BA%5D)
V = number of valence electrons
N = number of neighboring atoms
C = charge on cation
A = charge on an anion
In antimony(III) fluoride ,
Antimony being central atom: V= 5,N =3,C=0,A=0
Number of electrons : ![\frac{1}{2}[V+N-C+A]=4](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%5BV%2BN-C%2BA%5D%3D4)
Number of electrons around the central atom are 4 which means that
molecule has four
hybridized orbitals.
<u>Answer:</u> To calculate the pH of the buffer composed of
, we use the 
<u>Explanation:</u>
Phosphoric acid is a triprotic acid and it will undergo three dissociation reaction each having their respective dissociation constants.
The chemical equation for the first dissociation reaction follows:

The chemical equation for the second dissociation reaction follows:

The chemical equation for the third dissociation reaction follows:

To form a buffer composed of
, we use the
of second dissociation process
To calculate the
, we use the equation:

To calculate the pH of buffer, we use the equation given by Henderson Hasselbalch:
![pH=pK_a2+\log(\frac{[\text{conjugate base}]}{[\text{weak acid}]})](https://tex.z-dn.net/?f=pH%3DpK_a2%2B%5Clog%28%5Cfrac%7B%5B%5Ctext%7Bconjugate%20base%7D%5D%7D%7B%5B%5Ctext%7Bweak%20acid%7D%5D%7D%29)
![pH=pK_a2+\log(\frac{[HPO_4^{2-}]}{[H_2PO_4^-]})](https://tex.z-dn.net/?f=pH%3DpK_a2%2B%5Clog%28%5Cfrac%7B%5BHPO_4%5E%7B2-%7D%5D%7D%7B%5BH_2PO_4%5E-%5D%7D%29)
We are given:
= negative logarithm of second acid dissociation constant of phosphoric acid = 7.21
= concentration of conjugate base
= concentration of weak acid
Hence, to calculate the pH of the buffer composed of
, we use the 
Answer:
B
Explanation:
B It’s a physical change because the water and the salt kept their original properties.