Concept explainers
(a)
Interpretation:
To determine the empirical formula of a compound having 55.5% Ca and 44.5% S .
Concept Introduction:
Steps to obtain empirical formula from given % of elements:
- Assume the mass of compound be 100 g
- Write the mass of each element in 100 g of compound that must be equal to given percentage in grams.
- Divide mass of each element with their respective
atomic mass in order to obtain the moles of each element. - Divide the number of moles of each element with the smallest number of moles.
- Now, convert every number into a whole number by multiplying with an integer.
(b)
Interpretation:
To determine the empirical formula of a compound having 78.3% Ba and 21.7% F .
Concept Introduction:
Steps to obtain empirical formula from given % of elements:
- Assume the mass of compound be 100 g
- Write the mass of each element in 100 g of compound that must be equal to given percentage in grams.
- Divide mass of each element with their respective atomic mass in order to obtain the moles of each element.
- Divide the number of moles of each element with the smallest number of moles.
- Now, convert every number into a whole number by multiplying with an integer.
(c)
Interpretation:
To determine the empirical formula of a compound having 76.0% Zn and 24.0% P .
Concept Introduction:
Steps to obtain empirical formula from given % of elements:
- Assume the mass of compound be 100 g
- Write the mass of each element in 100 g of compound that must be equal to given percentage in grams.
- Divide mass of each element with their respective atomic mass in order to obtain the moles of each element.
- Divide the number of moles of each element with the smallest number of moles.
- Now, convert every number into a whole number by multiplying with an integer.
(d)
Interpretation:
To determine the empirical formula of a compound having 29.1% Na, 40.6% S, and 30.3% O atoms.
Concept Introduction:
Steps to obtain empirical formula from given % of elements:
- Assume the mass of compound be 100 g
- Write the mass of each element in 100 g of compound that must be equal to given percentage in grams.
- Divide mass of each element with their respective atomic mass in order to obtain the moles of each element.
- Divide the number of moles of each element with the smallest number of moles.
- Now, convert every number into a whole number by multiplying with an integer.
(e)
Interpretation:
To determine the empirical formula of a compound having 19.8% C, 2.20% H, and 78.0% Cl atoms.
Concept Introduction:
Steps to obtain empirical formula from given % of elements:
- Assume the mass of compound be 100 g
- Write the mass of each element in 100 g of compound that must be equal to given percentage in grams.
- Divide mass of each element with their respective atomic mass in order to obtain the moles of each element.
- Divide the number of moles of each element with the smallest number of moles.
- Now, convert every number into a whole number by multiplying with an integer.
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