A compound containing phosphorus and oxygen has a molar mass of 157.9 g/mol and an empirical formula of PO3 .

Chemistry

1 answer:

Yuki888 [10]3 years ago

3 0

Answer: The molecular formula of the compound is $P_2O_6$

Explanation:

The molecular formula is the chemical formula that tells about the number of atoms of each element present in a compound. Molecular formula and empirical formula can also be the same when the number of atoms is in the simplest whole-number ratio.

To calculate the molecular formula, the number of atoms of the empirical formula is multiplied by a factor known as valency that is represented by the symbol, 'n'.

$n=\frac{\text{Molecular mass}}{\text{Empirical mass}}$ ...(1)

Given empirical formula is $PO_3$

Empirical mass = $[(1\times 30.97) + (3\times 15.99)]=78.94 g/mol$

Molecular mass = 157.9 g/mol

Plugging values in equation 1:

$n=\frac{157.9 g/mol}{78.94g/mol}\\\\n=2$

Molecular formula of the compound becomes $P_{2\times 1}O_{2\times 3}=P_2O_6$

Hence, the molecular formula of the compound is $P_2O_6$

You might be interested in

Four molecules have carbon as the central atom and hydrogen atoms around it. Which shape would give rise to a polar molecule?

zzz [600]

Four molecules have carbon as the central atom and hydrogen atoms around it. The shape that would give rise to a polar molecule is a bent shape. The bent shape will not be symmetrical which will result to being polar. Hope this answers the question.

7 0

3 years ago

Madrid vs balonay soccor team why is Madrid better can u like compare it and Ik it say science and this rly is science my teache

nignag [31]

Eh I can't comment

That's y

No-one knows that I enter this site

Only a cousin knows

Cz I've got a protective family lol

4 0

3 years ago

2 Points

inessss [21]

Answer: D is the correct answer

Explanation: When there is no insulator surrounding a metal wire then there is nothing to stop the electrons from flowing outside of the wire, This means that anything the wire comes in contact with could get shocked or burnt when there is a current flowing through the wire.

7 0

3 years ago

Consider the balanced equation of K I KI reacting with P b ( N O 3 ) 2 Pb(NOX3)X2 to form a precipitate. 2 K I ( a q ) + P b ( N

professor190 [17]

Answer: 50.7 grams

Explanation:

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$