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3 years ago

Why does naphthalene have a higher melting point than biphenyl?

1 answer:

4 0

Naphthalene has a higher melting point than biphenyl because naphthalene is a polar compound while biphenyl is a non-polar compound. Studies show that polar compounds have higher melting and boiling points than nonpolar compounds. It is because polar compounds have strong intermolecular forces.

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Please Help - Complete the table

mario62 [17]

Answer:

Proteins

Elements: C, H, O, N, and some S

Monomer: amino acids

Functions: catalyzing chemical reactions, synthesizing and repairing DNA, structural support, transporting materials across the cell

Examples: hemoglobin, actin and myosin, albumin, keratin

Carbohydrates

Elements: C, H, O

Monomer: monosaccharides

Functions: cellular identity, source of energy, storage of energy, structural support, cell signaling, make ATP, convert solar energy

Examples: glucose, starch, glycogen, peptidoglycan, cellulose, chitin

Nucleic Acids

Elements: C, H, O, N, P

Monomer: nucleotides

Functions: storage and expression of genetic information, transmission of genetic code required for making proteins

Examples: DNA, RNA

Lipids

Elements: C, H, O, and some P and N

Monomer: fatty acids

Functions: energy storage, cell structure, insulation and protection, regulating and signaling, digestion

Examples: steroids (cholesterol), waxes, fats and oils, phospholipids

Hope that helps.

7 0

3 years ago

How many atoms of fluorine are in 5.6×1022 molecules of MgF2?

VashaNatasha [74]

Answer:You can set up stoichiemetry using the following equation:

(15.6 g MgF2) x (38g F / 62g MgF2) x (6.022x10^23 / 19gF)

= 3.03 x 10^23 molecules of F

or 1.52 x 10^23 molecules of F2

The number of molecules of magnesium fluoride in 15.6 g of MgF2 has to be found.

The molecular mass of MgF2 is 62.3018. 15.6 g of MgF2 is equivalent to 15.6/62.3018 mole of MgF2.

One mole of a gas has 6.02214179*10^23 particles.

15.6/62.3018 mole of MgF2 has (15.6/62.3018)*6.02214179*10^23 molecules of the compound.

(15.6/62.3018)*6.02214179*10^23

=> 1.5079*20^23

If this is rounded to one decimal figure the result is 1.51*10^23.

The number of molecules of MgF2 in 15.6 g of the gas is 1.51*10^23.

3 0

2 years ago

How do chemists model the valence electrons in a metal

Bumek [7]

Answer:

the valence electrons of atoms in a pure metal can be modeled as a sea of electrons

5 0

2 years ago

how will you seperate dye from black ink? draw a neatly labelled same?? fast I will mark brainly 100%

Nonamiya [84]

Answer:

put it through a distillery

7 0

3 years ago

Which organ in frog function similar to the function of lungs in a bird ?

34kurt

Answer:

Explanation:

FROGS BREATHE THROUGH SKIN IN WATER AND THROUGH LUNGS ON LAND.

I HOPE IT WILL HELP YOU.

Hope this will help you and please mark as brainlist answer

3 0

3 years ago