CHEMISTRY HIGH SCHOOL

Acid rain has a higher than normal pH.
a. True
b. False

Answers

Answer 1
Answer: False.  Since acids are proton donors and pH=-log[H⁺], acids lower the pH of the solution that they are put into.  Therefore acid rain will have a lower pH than normal.
I hope this helps.

Related Questions

Regarding the vaporization of water, which of the following is true? A. A great deal of heat must be lost by water to form hydrogen bonds and allow molecules to move farther apart. B. A great deal of heat must be absorbed by water to break hydrogen bonds and allow molecules to move farther apart. C. Vaporization of water is an exothermic process. D. Water must lose a great deal of heat before it will vaporize.
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On a mission to a newly discovered planet, an astronaut finds gallium abundances of 61.29% for 69Ga and 39.71% for 71Ga . What is the atomic mass of gallium for this location?The mass of 69Ga is 68.7200amu . The mass of 71Ga is 70.9200amu .

Answers

To solve this, we multiply the each mass of the isotope by the percentage of abundance of each isotope. 

average molecular weight = 0.6129(68.72amu) + 0.3971(70.92) = 70.28 amu

An electron in an atom moves from the ground state to an excited state when the energy of the electron(1) decreases
(2) increases
(3) remains the same

Answers

The answer is (2) increases. The definition of excited state is that the electrons have higher energy than ground state. For comprehension, the excited state is ready for reaction so it has higher energy.

An electron in an atom moves from a ground state to an excited state when the electron energy increases

Further Explanation

Excitation in physics is the addition of a number of discrete energies (called excitation energies) to a system — such as the nucleus of an atom, atom, or molecule — so as to produce a change, usually from the lowest energy state (ground state) to one of the higher energies (excited state).

In nuclear, atomic and molecular systems, excited states do not continue to be distributed but instead have certain discrete energy values. Thus, external energy (excitation energy) can be absorbed in discrete quantities.

Excitation energy is stored in excited atoms and the nucleus that emits light is usually seen from atoms and as gamma radiation from the nucleus because they return to the ground state. This energy can also be lost by collisions.

In the nucleus, energy is absorbed by protons and neutrons which are transferred to an excited state. Within a molecule, energy is absorbed not only by electrons, which are very enthusiastic for higher energy levels but also by whole molecules, which are highly excited for the discrete states of vibration and rotation.

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Electron moves brainly.com/question/496960

Excitation brainly.com/question/496960

Details

Class: High School

Subject: Chemistry

Keywords: electron, excitation, energies

Which one is it? Please help

Answers

Chemical properties can only be tested if you change the substance

Answer:

Chemical properties can be tested without changing the substance

Explanation:

What is are dipoles ​

Answers

a dipole is an electromagnetic phenomenon

The following balanced equation shows the decomposition of water (H2O). According to the equation, how many oxygen atoms are in the reactants? 2 H2O 2H2 + O2

Answers

Answer: There are 2 oxygen atoms on the reactant side.

Explanation:

Every balanced chemical equation follows law of conservation of mass.

This law states that mass can neither be created nor be destroyed, but it can only be transformed from one form to another form.

This law also means that total number of individual atoms on the reactant side will always be equal to the total number of individual atoms on the product side.

The given balanced chemical equation follows:

2H_2O\rightarrow 2H_2+O_2

On reactant side:

Number of hydrogen atoms = 4

Number of oxygen atoms = 2

On  product side:

Number of hydrogen atoms = 4

Number of oxygen atoms = 2

Hence, the number of oxygen atoms on the reactant side is equal to 2.

The following balanced equation, 2H2O = 2H2 +O2, shows the decomposition of water (H2O). According to the equation, there are two oxygen atoms in the reactants and another two oxygen atoms in the product side.

Mixtures can be separated by physical changes. Please select the best answer from the choices provided T F

Answers

Answer: Given statement is true.

Explanation:

When two or more substances mixed together then it results in the formation of mixture.  

For example, a mixture of sand and water.

Mixtures are not chemically combined species because they can be separated by physical methods like filtration, distillation etc.

Hence, we can conclude that the given statement, mixtures can be separated by physical changes is true.
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