CHEMISTRY HIGH SCHOOL

Which element is most likely to carry electric current easily?tin
sulfur
anitmony
selenium

Answers

Answer 1
Answer:

Answer: Option (a) is the correct answer.

Explanation:

Electric current is the flow of electrons and an atom that has free electrons will be able to carry current easily.

Hence, electronic configurations of the given elements are as follows.

Tin (Sn) - [Kr]4d^(10)5s^(2)5p^(2)

Sulfur (S) - [Ne]3s^(2)3p^(4)

Antimony (Sb) - [Kr]4d^(10)5s^(2)5p^(3)

Selenium (Se) - [Ar]3d^(10)4s^(2)4p^(4)

So, sulfur and selenium being non-metals won't be able to conduct electricity. Whereas both tin and antimony are poor metals but they are able to conduct electricity.

Antimony has half filled p-shell so, it will not lose its valence electrons as it is stable. Whereas tin will easily lose its valence electrons to become stable.

Thus, we can conclude that tin is the element that is most likely to carry electric current easily.
Answer 2
Answer: Your answer would be tin

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Calculate the number of atoms of each type in C12H22O11 and record

Answers

Answer:

1 mol of sucarose has 7.22 x10²⁴ atoms of C, 1.32 x10²⁵ atoms of H and 6.62 x10²⁴ atoms of O

Explanation:

C12H22O11 is the molecular formular for sucarose

So in 1 mol of sacarose, we have 12 mols of carbon, 22 moles of hydrogen, and 11 mols of oxygen.

As you know, 1 mol has 6.02x10²³ atoms so these are the rule of three to calculate the number of atoms of each type.

1 mol ______ 6.02x10²³

12 moles ______ 12 . 6.02x10²³ = 7.22 x10²⁴

22 moles ______ 22 . 6.02x10²³ = 1.32 x10²⁵

11 moles _______ 11 . 6.02x10²³ = 6.62 x10²⁴

What kingdom is humans in!

Answers

It is in the Animalia kingdom.
We humans are apart of the animalia kingdom.

Which has a larger radius Me or Xe?

Answers

Xe is bigger:)

I hope I helped:)

Please leave a thanks:)

Which element has the greatest density at stp? calcium, chlorine, carbon or copper?

Answers

density = mass/volume

Since at STP, one mole of any gas occupies 22.4 liters, therefore, the volume is equal.
So, we will arrange based on mass.

From the periodic table:
mass of carbon = 12 grams
mass of calcium = 40 grams
mass of chlorine = 35.5 grams
mass of copper = 63.5 grams

Based on this:
copper has the highest density.

The element that has maximum density at STP is copper.

Further explanation:

The property is a unique feature of the substance that differentiates it from the other substances. It is classified into two types:

1. Intensive properties:

These are the properties that depend on the nature of the substance. These don't depend on the size of the system. Their values remain unaltered even if the system is further divided into a number of subsystems. Temperature, refractive index, concentration, pressure, and density are some of the examples of intensive properties.

2. Extensive properties:

These are the properties that depend on the amount of the substance. These are additive in nature when a single system is divided into many subsystems. Mass, energy, size, weight, and length are some of the examples of extensive properties.

Density is a characteristic property of the substance. It is defined as the mass per unit volume. It is generally represented by $$\rho$$ .

The formula to calculate the density of the liquid is,

 \text{Density of liquid}(\rho)=\frac{\text{Mass of liquid(M)}}{\text{Volume of liquid (V)}}

Standard Temperature and Pressure is denoted as STP and the volume of 1 mole of gas at STP is 22.4 litres.  

The volume is constant and therefore density is directly related to mass.

Among the given elements copper has the highest molar mass and that is $$63.5\;{\text{g/mol}}$$ . Therefore the element that has maximum density at STP is copper.

Learn more:

1. Calculation of density: brainly.com/question/778841

2. Determine how many moles of water produce: brainly.com/question/1405182

Answer details:

Grade: Middle School

Subject: Chemistry

Chapter: Density

Keywords: density, mass, volume, STP, intensive, extensive, characteristic property, element, copper, chlorine, calcium, and carbon.

2H₂O ----> 2H₂ + O₂How many moles of hydrogen are produced when 6.28 mol of oxygen form?

A.) 3.14 mol
B.) 6.28 mol
C.) 12.6 mol
D.) 25.2 mol

Answers

2 H2O ------------> 2 H2 + 1 O2

2 mol H2 ----> 1 mol O2
x mol H2 -----> 6.28 mol O2

x = 6.28 * 2

x ≈ 12.6 mol

answer C

hope this helps!.
6.28 mol O2* (2 mol H2/ 1 mol O2)= 12.6 mol H2

The correct answer is C. 12.6 mol~

How much heat is released by the combustion of 2 mol of methane?
Use mc019-5.jpg.

Answers

From literature, the heat of combustion of methane is 55.5 MJ/kg methane. to account for the 2 mol of methane given we convert 2 mol to kg which is determined by multiplying 2 mol by molec.weight (16g/mol) divided by 1000 to convert to kg. This is equal to 0.032 kg methane. We multiply this to 55.5 MJ/kg.The total heat released is 1.776 MJ.
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