A solid compound in a sealed container was kept at a very low temperature in a freezer. When placed at room temperature, the substance quickly turned into a liquid. This compound is most likely which of the following?a.an ionic compound because it has a low boiling point
b. a covalent compound because it has a low boiling point
c.an ionic compound because it has a low melting point
d.a covalent compound because it has a low melting point

Answers

Answer 1
Answer:

Answer: A solid compound in a sealed container is a covalent compound because it has a low melting point.

Explanation:

Ionic compounds have strong electrostatic forces which are strong in nature and cannot be broken down at low temperature.

Whereas covalent compounds have Vanderwaal forces which are weak in nature. Therefore, covalent compounds melts at low temperature.

Thus, it can be concluded that a solid compound in a sealed container is a covalent compound because it has a low melting point.


Answer 2
Answer:

Answer: The answer is d

Explanation:


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Sodium's atomic number is 11. What does this tell you about an atom of sodium?

Answers

This tells us that an atom of sodium contains 11 electrons which is balanced by 11 protons. The atomic mass of the atom is then the sum of the protons and neutrons. If you know the atomic mass of sodium, you can subtract 11 (protons) to get the number of neutrons.

Mrs. Rushing fills a balloon with hydrogen gas to demonstrate its ability to burn. Which combination could sheuse to produce the hydrogen she needs?

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Zn and KOH

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I’ll mark your reply if the answer was correct.

Answers

Answer:

Its D

Explanation:

I took the Unit Test on Edge

Answer:

D. Mg and HCl

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Answers

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A transmutation reaction must always involve a(n) ____.a. change in the number of electrons in the atom
b. decrease in the number of neutrons in the nucleus of an atom
c. increase in the number of neutrons in the nucleus of an atom
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Answers

A transmutation reaction must always involve a change in the number of protons in a nucleus of an atom. A transmutation reaction involves a change in the structure of atomic nuclei and hence may be induced by a nuclear reaction. The correct answer is letter "D." I hope this helps. 

Answer: Option (d) is the correct answer.

Explanation:

Transmutation is a process which brings changes in the nucleus occur because of change in the number of protons of an atom. Therefore, the atom  formed will have different properties from its parent atom.

For example, ^(27)_(13)Al + ^(4)_(2)He \rightarrow ^(30)_(15)P + ^(1)_(0)n

A transmutation can be natural or artificial in nature.

Thus, we can conclude that a transmutation reaction must always involve a change in the number of protons in a nucleus of an atom.

How many grams of methane are needed to form 33.6 L of carbon dioxide

Answers

If you suppose standard temperature and pressure, 1 mol = 22.4 liters.

33.6 liters* 1mol/22.4liters = 1.5 mols.

Molar mass of carbon dioxide: 12 g/mol + 2x16 g/mol = 44 g/mol

Mass of 1.5 mols = 1.5mol * 44 g/mol = 66 g.

In the process of ionization, what is the relationship between the second ionization energy and the third ionization energy?

Answers

 The first ionization energy is the energy it takes to remove an electron from a neutral atom. The second ionization energy is the energy it takes to remove an electron from a 1+ ion. (That means that the atom has already lost one electron, you are now removing the second.) The third ionization energy is the energy it takes to remove an electron from a 2+ ion. (That means that the atom has already lost two electrons, you are now removing the third.) 
And 2nd ionization energy is higher than 1st ionization energy, 3rd is higher than 2nd, and so forth.