CHEMISTRY HIGH SCHOOL

A sample of gas confined in a cylinder with a movable piston is kept at constant pressure. The volume of the gas doubles when the temperature of the gas is changed from(1) 400. K to 200. K (3) 400.°C to 200.°C
(2) 200. K to 400. K (4) 200.°C to 400.°C

Answers

Answer 1
Answer: When the pressure is constant, the temperature and volume of the gas has ratio relationship: V1/T1= V2/T2. And the temperature using unit of K. Then we can get the answer is (2) 200 K to 400 K.

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Which of the following cannot pass across the placenta?(a) oxygen
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(c) blood
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Answers

The placenta is the structure that allows for transfer of wastes, oxygen, and
nutrients between the mother and the fetus.  The fetal blood comes extremely
close to the maternal blood in the placenta, but there is no intermingling of fetal
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After reading “The Crisis, No. 1,” what do you think Paine means by the line, "These are the times that try men’s souls"? Cite evidence from the text to support your analysis.

Answers

Paine is referring to the difficulties facing the colonists to stand up against the British Empire against imposed taxes and foreign rule. He says "Tyranny, like hell, is not easily conquered; yet we have this consolation with us, that the harder the conflict, the more glorious the triumph". This emphasises his point that the fight is against tyranny, although the battle may be difficult.

Answer:

America was going through a difficult period when Paine wrote "The Crisis, No. 1." Some soldiers were abandoning the fight for freedom, and therefore, Paine tried to convince them through these lines: "These are the times that try men's souls. The summer soldier and the sunshine patriot will, in this crisis, shrink from the service of their country; but he that stands by it now, deserves the love and thanks of man and woman."

Paine agreed that the time was full of troubles and problems, and it was testing the hard work of the people. However, he appealed to them to not abandon the war. He argued that hope was not yet lost, and victory was within reach as long as Americans continued their struggle.

Explanation: answer on plato/edmentum

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Answers

none of these; the most electronegative element is fluorine because an atom of fluorine needs an additional electron to join it's outer membrane, so the atom can achieve stability.

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Answers

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Answers

The correct answer is B. Platinum is the transition element among the choices. The elements belonging to this group are those having a partially filled d or f subshell. It usually refers to the d-block transition elements of the periodic table.

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Answers

The first one is correct.
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