CHEMISTRY HIGH SCHOOL

Which of the following is the final stage of a low mass star? *
1 point

Answers

Answer 1
Answer: You are actually giving 5 points. Ps I just got five points for telling you that

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Which most likely would be a new social issue resulting from the installation of a dam? A. Antibiotic resistance B. Habitat destruction C. Greater exposure to radiation D. Increase in biodiversity
Where do cold air masses form?
How does adding a non-volatile solute to a pure solvent affect the boiling point of the pure solvent?The solvent will have a lower boiling point. The solvent will have a higher boiling point. The solvent's boiling point will not be affected. The solvent's boiling point will most likely change, but not in a predictable way.

When a 1.0 M solution of HCl is titrated with a 1.0 M solution of KOH, which is the approximate pH at the equivalent point?

Answers

The equivalence point is when the concentration of H⁺ in solution is equal to the concentration of OH⁻ in solution.  Since H⁺ and OH⁻ react with each other to make water (H⁺(aq)+OH⁻(aq)→H₂O(l)) the pH at the equivalence point is 7 due to everything being neutralized.  (The equivalence point only has a pH of 7 when a strong acid is being titrated with a strong base).

I hope this helps.  Let me know if anything is unclear.  

Answer:

Decreases abs basicity decrease

Explanation:

How do lungfish survie in intense heat

Answers

I believe they use Estivation

Defined: To spend a hot, dry season in an inactive, dormant state, as certain reptiles, snails, insects, and small mammals.

While a certain isotope decays, it emits photons. what kind of decay is happening? alpha decay beta decay gamma decay positron decay

Answers

While a certain isotope decays, it emits photons.It is a type of gamma decay.

What are isotopes?

Isotopes are defined as substances having same number of protons but different number of neutrons.Number of protons is characteristic for determining position of elements in the periodic table.

Since,all isotopes have the same number of protons and hence have same position.They have similar chemical properties as they have same number of electrons.

They find applications in the field of nuclear medicine and oil and gas research . There are 2 types of isotopes : stable and unstable

Unstable isotopes are radioactive and are called as radioisotopes.Some of these isotopes are man -made and hence also called as artificial isotopes.Every element has an isotope which is either man-made or natural .

Many properties of isotopes depend on mass which is measured in atomic mass unit. The difference in actual mass and mass number is called mass defect.

Learn more about isotopes,here:

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Answer:

gamma decay.

Explanation:

A gamma decay emits only a gamma-ray photon,

The table below gives information about the nucleus of each 4 atoms Atom Number of protons Number of neutrons

A 6 6

D 6 7

G 7 7

E 7 8

How many different elements are represented by the nuclei in the table?

A 1

B 2

C 3

D 4

Answers

Atom Number of protons Number of neutrons. 2 elements are represented by the nuclei in the table

What is the difference between atomic number and atomic mass ?

Atomic number of an element  is defined as total number of protons present in the nucleus, neutrons carry no net electrical charge, so it is the charge number of the nucleus.

atomic mass of an element can be defined as the atomic weight is measured total mass of an element’s atom, the total number of neutrons and protons in the nucleus of an atom.

Both Atomic mass and an atomic number of elements are closely related if  atomic number is high, then the atomic mass is also said to be high.

For more details regarding fire atomic number , visit

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Answer:

B.

Explanation:

BECAUSE IT IS B.

Carbon can bond with other carbon atoms to produce cyclic hydrocarbon structures.TRUE

FALSE

Answers

Answer:

The answer is True

Explanation:

Cyclic hydrocarbons are organic compounds that consist of carbon and hydrogen atoms that bond to form rings or cyclic structures. The simplest are cycloalkanes, hydrocarbons formed by a closed carbon chain with all the simple bonds.

There is a very special group of cyclic hydrocarbons called aromatic hydrocarbons. Its name is due to the fact that the first to be discovered had pleasant smells. They all start from a basic structure that can be repeated many times. An example of this type of hydrocarbon is bancene.

The statement about "Carbon can bond with other carbon atoms to produce cyclic hydrocarbon structures" is true. Carbon can also bond with other four atoms because of its outer shell (valence shell) that has four electrons. This is the reason why organic molecules can be so large because of this bonding. 

how many millimeters of the approximately 0.014 M copper (ll) sulfate solution are needed to prepare 100.00 milliliters of a 0.00028 M copper (ll) sulfate solution

Answers

Answer:

To calculate the volume of the approximately 0.014 M copper (II) sulfate solution needed to prepare 100.00 milliliters of a 0.00028 M copper (II) sulfate solution, you can use the formula:

(Volume 1)(Concentration 1) = (Volume 2)(Concentration 2)

So, rearranging the formula, you can solve for Volume 1 (the volume of the 0.014 M solution):

Volume 1 = (Volume 2)(Concentration 2) / Concentration 1

Plugging in the values:

Volume 1 = (100.00 milliliters)(0.00028 M) / 0.014 M

Volume 1 ≈ 2.00 milliliters

Approximately 2.00 milliliters of the approximately 0.014 M copper (II) sulfate solution are needed to prepare 100.00 milliliters of a 0.00028 M copper (II) sulfate solution.
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