Correct Answer: D. Publicity

Correct Answer: D. 66

Correct Answer: B) 0.579

Explanation

To solve this problem, we need to find the mole fraction of oxygen. The mole fraction is the ratio of the partial pressure of a specific gas to the total pressure of the gas mixture.

The formula for calculating the mole fraction is:

\(X_{O_2} = \frac{P_{O_2}}{P_{total}}\)

Where \(X_{O_2}\) is the mole fraction of oxygen, \(P_{O_2}\) is the partial pressure of oxygen, and \(P_{total}\) is the total pressure of the gas mixture.

Given the partial pressure of oxygen (\(P_{O_2} = 452 mmHg\)) and the total pressure (\(P_{total} = 780 mmHg\)), we can substitute these values into the formula:

\(X_{O_2} = \frac{452}{780}\)

After calculating, we get:

\(X_{O_2} = 0.579\)

Thus, the mole fraction of oxygen is 0.579, which corresponds toOption B.

It's important to understand that the mole fraction is a dimensionless quantity that represents the proportion of one substance in a mixture. In this case, it indicates the proportion of oxygen in the air sample. Mole fraction is useful for calculating various properties of gas mixtures, such as partial pressures and concentration of each component.

Correct Answer: A. rain forest

Correct Answer: B. 1807

Correct Answer: C. great impovement

Explanation

(a) The cooperative society to be formed is a Thrift and Credit Society.

(b) Features of a thrift and credit society:

i. There is continuity, which means that the death of a member will not bring society to an end.

ii. Members are entitled to one vote each irrespective of the number of shares owned.

iii. The liability is limited to the shares held by the members.

iv. Profit is shared among members based on patronage.

v. The objective of the society is to generate funds which Would be given as loans to members.

vi. The management of the society is by a committee of elected members.

vii. Capital is raised from members' contributions.

(c) Advantages of thrift and credit society:

i. Society encourages saving habits among members.

ii. Members of the society have equal powers as all are entitled to one vote each during decision making.

iii. It enables members to have access to funds that could be difficult to obtain from Omer financial institutions.

iv. The death of any member cannot bring society to an end. It has continuity.

v. It improves members' standard of living as commodities such as cars, furniture, and housing are made available to members on credit.

vi. Members benefit from training and seminars which are organized by the society

vii. It grants loans to members.

Disadvantages of thrift and credit society:

i. There is usually difficulty in recovering loans which may hinder the operations of the society.

ii. Mismanagement/embezzlement of funds by elected members may lead to the collapse of society.

iii. There is great reliance on the contributions of members as well as repayment of loans.

iv. Some committee members lack management and technical skills to run the society, thereby leading to the collapse of the society.

Correct Answer: B) taking information to farmers on field

Correct Answer: B. 16

Correct Answer: C. registered mail