Answer
Verified
396.3k+ views
Hint: Consider the number of hydrogen and oxygen atoms that constitute one molecule of water and also the atomic masses of hydrogen and oxygen.
Complete answer:
We know that to calculate the ratio, we need to consider the number of hydrogen atoms, multiply them by the mass of one hydrogen atom and then divide that value by the value that we obtain after doing the same for the oxygen atoms in water
\[\text{Ratio = }\dfrac{(\text{no}\text{. of hydrogen atoms}\times \text{mass of hydrogen atom})}{(\text{no}\text{. of oxygen atoms}\times \text{mass of oxygen atom})}\]
We know that the molecular formula of water is ${{H}_{2}}O$. It has 2 hydrogen atoms and 1 oxygen atom.
No. of hydrogen atoms = 2
No. of oxygen atoms = 1
The relative atomic masses of both the elements are as follows:
Mass of hydrogen atom = 1
Mass of oxygen atom = 16
Now plugging these values in the equation given above, we get:
\[\text{Ratio = }\dfrac{(2\times 1)}{(1\times 16)}\]
\[\text{Ratio = }\dfrac{1}{8}\]
So, the correct answer is “Option A”.
Additional Information: The relative atomic masses are calculated relative to the mass of one hydrogen atom. So, the mass of hydrogen is used as a reference point to determine the atomic masses of other elements. Sometimes, carbon may also be used as a reference point due to its abundance in nature.
Note: Please do not get confused while considering what to take as the numerator and the denominator in the ratio. The element that is mentioned first should be considered as the numerator. Make sure that you consider the atomic masses while calculating and not the atomic numbers.
Complete answer:
We know that to calculate the ratio, we need to consider the number of hydrogen atoms, multiply them by the mass of one hydrogen atom and then divide that value by the value that we obtain after doing the same for the oxygen atoms in water
\[\text{Ratio = }\dfrac{(\text{no}\text{. of hydrogen atoms}\times \text{mass of hydrogen atom})}{(\text{no}\text{. of oxygen atoms}\times \text{mass of oxygen atom})}\]
We know that the molecular formula of water is ${{H}_{2}}O$. It has 2 hydrogen atoms and 1 oxygen atom.
No. of hydrogen atoms = 2
No. of oxygen atoms = 1
The relative atomic masses of both the elements are as follows:
Mass of hydrogen atom = 1
Mass of oxygen atom = 16
Now plugging these values in the equation given above, we get:
\[\text{Ratio = }\dfrac{(2\times 1)}{(1\times 16)}\]
\[\text{Ratio = }\dfrac{1}{8}\]
So, the correct answer is “Option A”.
Additional Information: The relative atomic masses are calculated relative to the mass of one hydrogen atom. So, the mass of hydrogen is used as a reference point to determine the atomic masses of other elements. Sometimes, carbon may also be used as a reference point due to its abundance in nature.
Note: Please do not get confused while considering what to take as the numerator and the denominator in the ratio. The element that is mentioned first should be considered as the numerator. Make sure that you consider the atomic masses while calculating and not the atomic numbers.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
What is the stopping potential when the metal with class 12 physics JEE_Main
The momentum of a photon is 2 times 10 16gm cmsec Its class 12 physics JEE_Main
How do you arrange NH4 + BF3 H2O C2H2 in increasing class 11 chemistry CBSE
Is H mCT and q mCT the same thing If so which is more class 11 chemistry CBSE
Trending doubts
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
Select the word that is correctly spelled a Twelveth class 10 english CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
What is the z value for a 90 95 and 99 percent confidence class 11 maths CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
What organs are located on the left side of your body class 11 biology CBSE
What is BLO What is the full form of BLO class 8 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE