Answer:
See explanation
Explanation:
Polymerization refers to the formation of a macro-molecule by the aggregation of small molecules called monomers. Monomers are the small molecules that are joined together to form a polymer.
The formation of a condensation polymer is accompanied by the loss of a small molecules such as water as shown in the image attached.
Succinic acid reacts with ethylenediamine to form a nylon type polymer. The nature of this reaction is detailed in the image attached to this answer. Recall that a polymer may contain (n) number of monomers joined together in the macromolecule.
Answer:
a. 0.20 M HF and 0.10 M NaOH.
c. 0.10 M HF and 0.10 M NaF
d. 0.10 M HCl and 0.20 M NaF.
Explanation:
A buffer solution consists of a weak acid and its conjugate base, or of a weak base and its conjugate acid.
In this case, <u>HF is the weak acid and F⁻ is its conjugate base</u>.
Let's go case-by-case:
a. 0.20 M HF and 0.10 M NaOH.
- Some -but not all- HF will react and produce F⁻, leaving a buffer solution.
b. 0.10 M HF and 0.10 M NaOH.
- All HF will react, not a buffer solution.
c. 0.10 M HF and 0.10 M NaF.
- There's no reaction, and both HF and F⁻ are directly added, it is a buffer solution.
d. 0.10 M HCl and 0.20 M NaF.
- Some F⁻ will react and produce HF, leaving a buffer solution.
The correct answers are A), C) and D).
Answer:
. The old camera flash bulb used Mg metal sealed in a bulb with oxygen. At 25°C, the reaction is: Mg(s) + O2(a) → MgOS) AS (J/K.mol): Mg=32.7; O2=205.0; MgO=26.9 AH (kJ/mol: Mg=0; O2=0; MgO=-601.2
Explanation:
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Explanation:
Alkali metals are the metals which belong to group 1 of the periodic table. As these elements have one valence electron so they are highly reactive in nature.
Some characteristics of metals are as follows.
- Usually metals are hard in nature.
- They have shiny surface.
- Metals are malleable and ductile in nature.
- Metals are good conductors of heat and electricity.
When these metals react with water then it leads to the formation of metal hydrides.
For example,
Thus, we can conclude the following for alkali metals:
a. What is the group number? - Group 1.
Are these metals reactive? - Yes
b. Do these metals occur freely in nature? - No
c. How many electrons are in their outer shell? - 1 valence electron
d. What are the three characteristics of ALL metals?
- Usually metals are hard in nature.
- They have shiny surface.
- Metals are malleable and ductile in nature.
e. Are these metals soft or hard? - Both
f. Name the two most reactive elements in this group? - Lithium And Sodium
g. What happens when they are exposed to water? - They form hydrides.