Y short answer questions: What do you mean by infrastructures of development?
Define education in a sentence.
How has the WHO defined health?
Write any four means of communication.
Electricity can be generated through different sources. Write any four such source
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tort answer questions:
Mention any four importance of electricity in the present days?
"Infrastructures of development are not developed as per the expectation in
Nepal." Write any four causes of it.
Mention the importance of education in a paragraph.

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.