CHEMISTRY HIGH SCHOOL

In which type of chemical reaction are electrons transferred?1) organic addition
2) oxidation-reduction
3) double replacement
4) acid-base neutralization

Answers

Answer 1
Answer: The correct answer is 2. 

In oxidation-reduction reactions (or redox reactions), a number of electrons are transferred between two species. During this process, the oxidation number of an atom (or molecule or ion) changes by receiving or losing an electron.
Answer 2
Answer:

Answer: It is number 2

Related Questions

What is the main factor that determines if a star will become a black hole
Which statement describes the composition of potassium chlorate, KClO3?(1) The proportion by mass of elements combined in potassium chlorate is fixed.(2) The proportion by mass of elements combined in potassium chlorate varies.(3) Potassium chlorate is composed of four elements.(4) Potassium chlorate is composed of five elements.
All compounds containing carbon are organic. a. True b. False
A chemist who is performing this reaction starts with 160.1 g of NH4NO3. The molar mass of NH4NO3 is 80.03 g/mol; the molar mass of water (H2O) is 18.01 g/mol. What mass, in grams, of H2O is produced?
What does the name 2–butene tell you about this hydrocarbon's molecular structure?A.There are two carbon atoms and all single carbon bonds. B. There are two carbon atoms and a double carbon bond. C. There are three carbon atoms and a double carbon bond that starts on the second carbon atom. D. There are four carbon atoms and a double carbon bond that starts on the second carbon atom.

An aqueous solution has a mass of 490 gramscontaining 8.5 103 gram of calcium ions. The
concentration of calcium ions in this solution is
(1) 4.3 ppm (3) 17 ppm
(2) 8.5 ppm (4) 34 ppm

Answers

One way of expressing concentration is by expressing it by parts per million or ppm. Parts per million is equal to 1 milligram of solute per kilogram of solution. The problem is solved as follows:
ppm = .0085103 mg / .490 kg = 0.017 ppm

Relationship between genes chromosomes an dna .

Answers

Answer:

Genes are segments of DNA that contain the code for a paticular  protein that works in one or more types of cells in the body. Chromosomes are structures within cells that contain a person's genes. Genes are contained in chromosomes, which are in the cell nucleus.

Explanation:

Answer:

The answer should be A

Explanation:

The elements on the Periodic Table are arranged in order of increasing(1) atomic mass
(2) atomic number
(3) first ionization energy
(4) selected oxidation state

Answers

correct answer is an atomic mass

Explain the valence differences etc between the two polyatomic ions: nitrate and nitrite.

Answers

Both Nitrates and Nitrites are inorganic chemical compounds, and as the names imply, the characteristic element in them is ‘N’ or Nitrogen, which has an atomic number of 7. Nitrogen is an odourless diatomic gas in nature and is reactive. The element Nitrogen is also highly electro-negative. And both Nitrates and Nitrites are two important classes of Nitrogen-containing compounds. The main difference between Nitrate and Nitrite is that Nitrate group contains one Nitrogen atom and three Oxygen atoms whereas Nitrite group contains one Nitrogen atom and two Oxyg
Both Nitrates and Nitrites are inorganic chemical compounds, and as the names imply, the characteristic element in them is ‘N’ or Nitrogen, which has an atomic number of 7.

Hope this helps.

Which set of properties does a substance such as CO2(g) have?

Answers

Since CO2 (Carbon Dioxide) is a gas these properties would be: -no definite shape and volume. A gas is invisible and colorless to the human naked eye. An example of pure gas would be like air. Just like air, you see no definite shape and weight or volume. 

The compounds KNO3 and NaNO3 are soluble in water.55 Compare the entropy of 30. grams of solid KNO3 at 20.°C with the entropy of 30. grams of KNO3 dissolved in 100. grams of water at 20.°C. [1]


56 Explain why the total thermal energy of a sample containing 22.2 grams of NaNO3 dissolved in 200. grams of water at 20.°C is greater than the total thermal energy of a sample containing 11.1 grams of NaNO3 dissolved in 100. grams of water at 20.°C. [1]


57 Compare the boiling point of a NaNO3 solution at standard pressure to the boiling point of water at standard pressure. [1]

Answers

55) Answer==>   the solid has less entropy
56) Answer==> 22.2g produces more heat than 11.1g when dissolved
57) Answer==> the solution has a higher boiling point
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