Which is more important in determining a compound’s melting points, polarity or molar mass? Why?

Answers

Answer 1

Answer: Both polarity and molar mass affect the melting points of a compounds. However, polarity is more prioritized for compounds of similar molar mass. The order of increasing melting point follows: non-polar < polar < ionic.

Ionic compounds have the strongest forces holding them which is why it requires higher temperature to overcome those forces. Next, polar substances have weaker electrostatic forces than ionic compounds, but have stronger forces than non-polar compounds due to the presence of dipole-dipole interaction. The force present in non-polar compounds is Van Der Waals forces.

Answer 2

Answer: in determining a compound's melting points, polarity is more important

Every compound is contained by molecules.

Polarity determine how much energy is needed to break these molecules, meanwhile molar mass only determine the weight of the molecules. Even though molar mass do affecting the boiling point, it's not as much as the basic resistance of the separation of inter molecular forces does.

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State the use of multimeters

Answers

Answer:

a use of mesurements

Explanation:

Using the periodic table, determine which material is most likely to be a good insulator. magnesium silver aluminum sulfur

Answers

The correct answer is this one: "Magnesium." Using the periodic table, the material that is most likely to be a good insulator is the magnesium. Magnesium is a chemical element with symbol Mg and atomic number 12. It is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column of the periodic.

Using the periodic table, determine which material is most likely to be a good insulator.

magnesium
silver
aluminum
sulfur

the correct answer is 4. sulfur

Why might the earths oceans be described as one huge ocean

Answers

It might be described that way because all of the oceans on this planet are connected, therefore form one huge ocean.

This is probably because all the oceans help us by giving rain and all the oceans are connected with each other. Hope this helps you.

The moon will always appear over the eastern horizon at the same time each night. true or false

Answers

false it will be false

Answer:

false

Explanation:

Modern Science has a specific explanation or the origin of this topic.

Methane (CH4, 16.05 g/mol) reacts with oxygen to form carbon dioxide (CO2, 44.01 g/mol) and water (H2O, 18.02 g/mol). Assume that you design a system for converting methane to carbon dioxide and water. To test the efficiency of the system in the laboratory, you burn 5.00 g methane. The actual yield is 6.10 g water. What is your percent yield?

Answers

Answer:

The percent yield of reaction is 54.32%.

Explanation:

$CH_4+3O_2\rightarrow CO_2+2H_2O$

Moles of methane = $(5.00 g)/(16.05 g/mol)=0.3115 mol$

According to reaction, 1 mole of methane gives 2 moles of water .

The 0.3115 moles of methane will give:

$(2)/(1)* 0.3115 mol=0.623 mol$ of water

Mass of 0.9345 moles of water = 0.623 mol × 18.02 g/mol = 11.23 g.

Theoretical yield of methane = 11.23 g.

Experimental yield of methane = 6.10 g.

The percent yield of reaction:

$\%(Yield)=\frac{\text{Experimental yield}}{\text{Theoretical yield}}* 100$

The percent yield of reaction is :

$\%(Yield)=(6.10 g )/(11.23 g)* 100=54.32\%$

Answer:54.5

Explanation:

An atom with 9 protons and 10 neutrons in its nucleus and 9 electrons in movement around the nucleus would be an atom of which element?A: Beryllium
B: Neon
C: Fluorine
D: Potassium

Answers

Answer: The element is Fluorine.

Explanation:

Atomic number is defined as the number of protons or electrons that are present in a neutral atom.

Atomic number = number of protons = number of electrons

Atomic mass is defined as the sum of number of protons and neutrons that are present in an atom.

Atomic mass = Number of protons + Number of neutrons

We are given:

Number of protons = 9 = Atomic number

Number of electrons = 9

Number of neutrons = 10

Mass number = 9 + 10 = 19

The element having atomic number equal to 9 and mass number equal to 19 is fluorine.

Hence, the element is Fluorine.

The correct answer is C. We know this is true since the number of protons an atom has is its atomic number. Since this atom has 9 protons, look for the element on the periodic table that has an atomic number of 9. The element that has an atomic number of 9 is flouring.

I hope this helps.

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