A sample of vinegar has a pH of 5, and a sample of rainwater has a pH of 6. Which of the following statements best describes these two substances?A. Both samples are bases, and vinegar is more basic.
B. Both samples are acids, and vinegar is more acidic.
C. Both samples are bases, and rainwater is more basic.
D. Both samples are acids, and rainwater is more acidic.

Answers

Answer 1

Answer:

Answer: The correct answer is option B.

Explanation:

pH is defined as negative logarithm of hydrogen ion concentration. It is basically defined as the power of hydrogen ions in a solution. It ranges to the scale of 1-14. The solutions are divided into 3 categories on the basis of the pH range:

If the pH of the solution ranges from 1 to 6.9, the solution is said to be acidic. Less the pH, more the acidity of the solution.
If the pH of the solution ranges from 7.1 to 14, the solution is said to be basic. More the pH, more the acidity of the solution.
If the pH of the solution is 7, the solution is said to be a neutral solution.

We are given:

pH of vinegar = 5

pH of rainwater = 6

As, the pH of both the solutions is less than 7. Thus, both the solutions are acidic in nature and also pH of vinegar is less, so this solution will be more acidic in nature.

Hence, the correct answer is Option B.

Answer 2

Answer: Statement B correctly describes the situation.

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Which statement correctly describes a chemical equilibrium? it must take place in an open system the mass of the reactants and the mass of the products are no equal it is affected by the addition of a catalyst it does not involve a reversible reaction the concentrations of reactants and products are equal

Answers

In your choices, the best answer is the mass of the reactants and the mass of the products are no equal. The chemical equilibrium can take place in a close system and can not be affected by catalyst and is a reversible reaction. The best describe should be the concentration of reactants and products are constant.

The chemical equilibrium can take place in a close system and can not be affected by catalyst and is a reversible reaction.

The term "chemical equilibrium" describes a situation in which a chemical reaction's forward reaction rate and reverse reaction rate are equal. In other words, throughout time, the reactant and product concentrations in the reaction mixture do not change. Even if the individual reactions may still be in progress, there is no net change in the reactant or product concentrations at the point of chemical equilibrium. This occurs as a result of the equalisation of the rates at which molecules react to create products and molecules disintegrate into reactants. Even though the reaction is still taking place at the molecular level, the system is in equilibrium and it appears to have stopped.

To know more about chemical equilibrium, here:

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Which is an example of pseudoscience? A. use of X-rays to observe the bones of the arm B. use of DNA analysis to determine paternity C. use of vaccines to prevent the occurrence of disease D. use of astrology to predict the personality of a child

Answers

Answer is D. use of astrology to predict the personality of a child

Astrology is not a science, astronomy is a science.
Astrology is more related to myths, legend and human interpretation of the sky, universe, planets.

Which is an example of pseudoscience?
Answer:
D. use of astrology to predict the personality of a child

As a sample of matter is cooled, its particles

Answers

As a sample of matter is cooled, its particles slowly moves because their kinetic energy is being reduced due to the temperature being reduced also.

Which of the following statements about ice melting is true?A) Energy flows from the ice to its surroundings.
B) Water molecules move from their fixed positions.
C) Water molecules lose energy.

Answers

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Given the balanced equation:F2 energy → F F
Which statement describes what occurs during
this reaction?
(1) Energy is absorbed as a bond is formed.
(2) Energy is absorbed as a bond is broken.
(3) Energy is released as a bond is formed.
(4) Energy is released as a bond is broken.

Answers

Answer: The correct option is 2.

Explanation: We are given in the question that Fluorine molecule is dissociating into two Fluorine atoms. Equation for the following is given by:

$F_2+energy\rightarrow F+F$

In a chemical reaction if the energy is written at the reactant side, the energy is being absorbed and if the energy is written at the product side, the energy is being released.

From the given chemical equation, the energy is written at the reactant side, so the energy is being absorbed by the reactants in order to break the bond between $F_2$ molecule to form 2 individual Fluorine atoms.

Hence, the correct option is 2.

(2) Energy is absorbed as a bond is broken is the correct answer.

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Answers

Answer: Gold can't be heavier than itself.

Explanation: If you have a cookie and a cookie, you can't tell the difference. If you have a big cookie and a small cookie, than the big cookie will weight more.

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