Name: Relative Atomic Mass of Elements: Isotopes
Uploaded: 2019-07-19
Duration: 7 min 1 s
Description: Watch how relative atomic masses correlate to the presence of isotopes. Find the reason why atomic masses on the periodic table are not whole numbers.

Question

Calculate the relative molecular mass of hydrated calcium chloride (

{CaCl}_{2} . 6 H_{2} O

).

Accepted Answer

Relative molecular mass can be calculated by adding the individual atomic masses of all elements present in the compound. The atomic mass of calcium is $40$ , the atomic mass of chlorine is $35.5$ , the atomic mass of hydrogen is $1$ and the atomic mass of oxygen is $16$ .

Relative molecular mass = atomic mass of $Ca$ $+ 2 \times$ atomic mass of $Cl$ $+ 12 \times$ atomic mass of hydrogen $+ 6 \times$ atomic mass of oxygen.

$\Rightarrow 40 + 2 \times 35.5 + 12 \times 1 + 6 \times 16 = 219 amu .$

The relative molecular mass of hydrated calcium chloride is $219 amu$ .

Calculate the relative molecular mass of hydrated calcium chloride ( ${CaCl}_{2} . 6 H_{2} O$ ).

Important Questions on The Language of Chemistry

Learn and Prepare for any exam you want !

Calculate the relative molecular mass of hydrated calcium chloride (CaCl2. 6H2O).

Important Questions on The Language of Chemistry

Learn and Prepare for any exam you want !

Calculate the relative molecular mass of hydrated calcium chloride ( ${CaCl}_{2} . 6 H_{2} O$ ).