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3 years ago

Which of the following most influenced the changing nature of classification systems

Chemistry

2 answers:

Lyrx [107]3 years ago

5 0

Hope I helped you enjoy your day

Nuetrik [128]3 years ago

4 0

Answer: increased knowledge of genetics leads to reclassification.

Explanation:

The classification system was initially was made on the basis of the similarities in their physical, internal characters and their habitats. Classification systems are always subject to update, based on the different factors.

The increased knowledge of the genome and the DNA is helping to tell that the species or organisms look different in several ways are actually closely related or share the ancestry.

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When 3.51 g of phosphorus was burned in chlorine, the product was a phosphorus chloride. Its vapor took 1.77 times as long to ef

kumpel [21]

Answer:

molar mass of the phosphorus chloride = 138.06 g/mol

Explanation:

mass of phosphorus will be the same as mass of CO2, since it is stated that they are of equal amount.

mass = 3.51 g

lets assume that it took the CO2 1 sec to effuse, then the time taken by the phosphorus chloride will be 1.77 sec

From this we can say that

rate of effusion of CO2 = 3.51/1 = 3.51 g/s

rate of effusion of the phosphorus chloride = 3.51/1.77 = 1.98 g/s

From graham's equation of effusion,

$\frac{Rc}{Rp}$ = $\sqrt{\frac{Mp\\}{Mc} }$

Rc = rate of effusion of CO2 = 3.51 g/s

Rp = rate of effusion of phosphorus chloride = 1.98 g/s

Mc = molar mass of CO2 = 44.01 g/mol

Mp = molar mass of the phosphorus chloride = ?

Imputing values into the equation, we have

$\frac{3.51}{1.98}$ = $\sqrt{\frac{Mp\\}{44.01} }$

1.77 = $\frac{\sqrt{Mp} }{6.64}$

11.75 = $\sqrt{Mp}$

Mp = $11.75^{2}$

Mp = molar mass of the phosphorus chloride = 138.06 g/mol

5 0

3 years ago

All of the following pairs of ions are isoelectronic except which one?

mash [69]

Answer: Fe2+ & Mn3+

Explanation:

6 0

3 years ago

HELIUM) has chemical properties so different from those of the other elements that it cannot be placed in any group. *

siniylev [52]

Answer:

jesus

Explanation:

jesus is always the answer

6 0

3 years ago

Can someone help me with this please

never [62]

Answer: B. 1:2

Explanation: Beryllium and chlorine forms a binary ionic compound. Ionic compound is formed when a metal loses its electrons to a receiving non metal. Beryllium (metal) has two valence electrons while chlorine (nonmetal) has seven valence electrons, and so a beryllium atom has to give out its two valence electrons to attain a duplet stable structure while a chlorine atom will gain one electron to attain its stable octet structure. In the reaction between beryllium and chlorine, two atoms of chlorine have to accept the two electrons from one beryllium atom to attain their stable octet structure.

The formula of the compound formed is BeCl2.

3 0

3 years ago

Writing Chemical Equations

nignag [31]

Answer:

The prefix di means 2 and the prefix hexa means 6.

As per IUPAC rules you must use the prefixes to indicate the number of atoms of each element in the formula.

So, the proper name for the compound C2H6 is dicarbon hexahydride.

Explanation:

8 0

3 years ago