48dm3 of a gas has a mass of 262g how many moles is this? What is the Mr? What must this element be?

Answers

Answer 1

Answer: $n=(V)/(V_(0))\n\nV=48dm^(3)\nV_(0)=22.4(dm^(3))/(mol)\n\nn=(48dm^(3))/(22.4(dm^(3))/(mol))\approx2mol\n\nn=(m)/(M_(r)) \ \ \ \Rightarrow \ \ \ M_(r)=(m)/(n)\n\nm=262g\nn=2mol\n\nM_(r)=(262g)/(2mol)=131(g)/(mol)$

This element must be xenon.

Answer 2

Answer:

Final answer:

The number of moles is 1.49 and the molar mass is 176.124 g/mol.

Explanation:

To determine the number of moles, we can use the formula:

moles = mass / molar mass

Given that the mass of the gas is 262g and the molar mass is 176.124 g/mol, we can substitute these values into the formula:

moles = 262g / 176.124 g/mol = 1.49 moles (rounded to two decimal places).

Therefore, the number of moles is 1.49. The molar mass of the compound is 176.124 g/mol. In order to determine what element this is, we would need more information about the compound.

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Whh is most carbon compound poor conductor of electricity

Answers

Explanation:

Most of the carbon compound are convalent in nature and all of the electrons participates in bond formation as such there is no free electrons left to conduct electricity. Moreover carbon compound doesn't readily dissociates to form ions, which conduct electricity. Hence carbon compound are poor conductor of electricity.

Answer:

It is because all the valence electrons are used to form covalent bonds. So, there will be no electrons left to flow the electric current through them.

Explanation:

hope it helps

The thermal transfer of energy by electromagnetic waves through the vacuum of space is called what?

Answers

Answer: Radiation

Explanation: There are three modes of heat transfer:

1. Conduction: This type of heat transfer happens when there is direct contact between the two object.

2. Convection: This type of heat transfer happens when there is a movement of fluid (liquid or gas).

3. Radiation: This type of heat transfer happens when there is direct transfer of energy through space.

Radiation i think is the correct answer

Which element has atoms that can bond with each other to form long chains or rings?(1) carbon (3) oxygen
(2) nitrogen (4) fluorine

Answers

The correct answer is option 1. It is the carbon (C) atom that can bond with each other to form ring and chain structures in compounds. These ring and chain structures and compounds are called organic compounds. Chain structures include alkanes, alkenes, alkynes. Ring structures include cyclic hydrocarbons and aromatic hydrocarbons.

Answer: Option (1) is the correct answer.

Explanation:

Carbon atoms are able to combine with its atoms resulting in formation of long chains. This property of carbon is known as catenation. Whereas carbon atom also has the property to combine with other atoms and results in the formation of long chains or rings.

On the other hand, oxygen, nitrogen, and fluorine does not form long chains or rings.

Thus, we can conclude that carbon is the element whose atoms can bond with each other to form long chains or rings.

What is the total number of valence electrons in an atom of sulfur in the ground state?A. 6
B. 8
C. 3
D. 4

Answers

I am not sure but I think it might be A) 6. Sorry if it is not correct because I am not good at chemistry, Hope this helped! :)

Sulfur is in group 6A. All the elements in the A group are how many electrons it has. Since sulfur is in 6A it has 6 electrons so it the answer is A) 6.

Given the balanced ionic equation:Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)
Which equation represents the oxidation half reaction?
(1) Zn(s) + 2e– → Zn2+(aq)
(2) Zn(s) → Zn2+(aq) + 2e–
(3) Cu2+(aq) → Cu(s) + 2e–
(4) Cu2+(aq) + 2e– → Cu(s)

Answers

Answer: Option (2) is the correct answer.

Explanation:

Oxidation is the process in which there is loss of electrons or increase in oxidation number of the element.

Whereas reduction is the process in which there is gain of electrons or decrease in oxidation number of the element.

For example, $Zn(s) + Cu^(2+) \rightarrow Zn^(2+) + Cu(s)$

Oxidation-half reaction: $Zn(s) \rightarrow Zn^(2+) + 2e^(-)$

Reduction-half reaction: $Cu^(2+) + 2e^(-) \rightarrow Cu(s)$

Thus, we can conclude that the given equation Zn(s) → Zn2+(aq) + 2e– represents the oxidation half reaction.

The equation that represents the oxidation half reaction is Zn(s) → Zn2+(aq) + 2e–

What is oxidation reaction?

Oxidation reaction is the process in which there is loss of electrons or increase in oxidation number of the element.

From all the given half reaction, there is only one reaction with increase in oxidation number;

Zn(s) → Zn2+(aq) + 2e–

Zn(s) - oxidation = 0
Zn2+ - oxidation number = +2

Thus, there is increase in oxidation number of 0 to + 2.

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What is sublimation?

Answers

Sublimation is the transition from solid to gaseous.

hope this helps!

Solidsto gases without entering liquid state

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