Which of the following combinations will result in a reaction that is spontaneous at all temperatures?positive enthalpy change and positive entropy change
positive enthalpy change and negative entropy change
negative enthalpy change and positive entropy change
negative enthalpy change and negative entropy change

Answers

Answer 1

Answer: The right answer for the question that is being asked and shown above is that: "negative enthalpy change and negative entropy change." The combination that will result in a reaction that is spontaneous at all temperatures is negative enthalpy change and negative entropy change

Answer 2

Answer:

Answer:

Spontaneous at ALL Temperatures: Negative enthalpy change and positive entropy change

I promise this is 100% correct. I just took the Honors Entropy quiz and I got the question correct.

The other answer provided by the verified user Hagrid is incorrect.

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What is Neons group and periodic number?

Answers

Its a noble gas. Its group number is 18 period number is 2

Answer:Hello,

Neon is a noble gas. It is located Group 18 and the oxidation number is 10.

I hoped it helped have a nice day!

Maki uses 20 gallons of a solution with an unknown ethanol concentration and 60 gallons of a 12% ethanol solution to make 80 gallons of a 10% solution. What is the value of x, the concentration of the unknown ethanol solution?. a. 0.02.
b. 0.04.
c. 0.05.
d. 0.08

Answers

This question is based on the concept of percentage by mass. Therefore the value of x, concentration of unknown ethanol solution is 4% when 20 gallons of a known solution is used. Option b is correct option

What is percentage by mass?

Mass percentage represents the the percentage of each element that is making a particular compound. Mass percentage does not have any unit as numerator and denominator contains the same unit.

Mathematically,

Percentage of mass = (component’s mass ÷ total mass) x 100%

According to the question the equation can be written as:

20× (x÷ 100) + 60×0.12 = 80× 0.10

x÷5 + 7.2 = 8

x÷ 5 = 0.8

x = 4%

concentration of unknown solution = 4%

Therefore, the value of x, concentration of unknown ethanol solution is 4% when 20 gallons of a solution is used. Option b is correct option

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the correct answer is B

Which of the following is true about the structure of an atom?A. Electrons, neutrons, and protons are made up of even smaller constituents, such as quarks and gluons.

B. An atom is not composed of smaller parts and cannot be broken down into smaller constituents.

C. Atoms are composed of tiny cells that make up all forms of matter.

Answers

The correct answer should be A. Atoms can be broken up into protons, neutrons, and electrons. Protons and neutrons can be broken up into even smaller particles but I am not sure if it has been proven that electrons can be broken up into smaller particles. I hope this helps. Let me know if anything is unclear.

A person pushes horizontally with a force of 220. N on a 56.0 kg crate to move it across a level floor. The coefficient of kinetic friction is 0.21. (a) What is the magnitude of the frictional force? (b) What is the magnitude of the crate's acceleration?

Answers

Explanation:

(a) As it is given that there is no vertical displacement. Hence, the forces on y-axis are equal and opposite.

Also, it is known that F = mg

So, F = $56 kg * 9.8 m/s^(2)$

= 548.8 N

Also, $F_(f) = \mu N$

where, $\mu$ = coefficient of kinetic friction

N = force calculated

Putting the values into the formula as follows.

$F_(f) = \mu N$

= $0.21 * 548.8$

= 115.25 N

Hence, the magnitude of the frictional force is 115.25 N.

(b) Now, let us assume that the acceleration is towards the positive x-direction.

$F - F_(f) = ma$

$548.8 N - 115.25 = 56 * a$

a = 7.74 $m/s^(2)$

Therefore, the magnitude of the crate's acceleration is 7.74 $m/s^(2)$ .

The function of most proteins depends primarily on the

Answers

type and order of amino acids

1.type and order of amino acids. 2.environment of the organism.3.availability of starch molecules.

What did John Dalton contribute to the understanding of the atom?

Answers

John Dalton contribute to the understanding of the atom that all matter was composed of atoms, indivisible and indestructible building blocks.

While all atoms of an element were identical, different elements had atoms of differing sizes and mass.

What is an atom?

An atom is a particle of matter that uniquely defines a chemical element.

An atom consists of a central nucleus that is usually surrounded by one or more electrons.

Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties.

Dalton based his theory on the law of conservation of mass and the law of constant composition.

The theory states that all matter is made of atoms, which are indivisible.

(1) All matter is composed of tiny, indivisible particles, called atoms, that cannot be destroyed or created.

(2) Each element has atoms that are identical to each other in all of their properties.

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Dalton's atomic theory proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical, different elements had atoms of differing size and mass.

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