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An O-H bond has a length of 9.6 × 10^-11 nm - OCR Gateway - GCSE Chemistry: Combined Science - Question 4 - 2021 - Paper 9
Question 4
An O-H bond has a length of 9.6 × 10^-11 nm. What is the approximate size of a water molecule, H₂O? A 1 × 10^-11 nm B 5 × 10^-11 nm C 1 × 10^-10 nm D 3 × 10^-10... show full transcript
Worked Solution & Example Answer:An O-H bond has a length of 9.6 × 10^-11 nm - OCR Gateway - GCSE Chemistry: Combined Science - Question 4 - 2021 - Paper 9
Step 1
What is the approximate size of a water molecule, H₂O?
Answer
To determine the approximate size of a water molecule, we consider the structure and dimensions of the bonds within the molecule. The O-H bond length is given as 9.6 × 10^-11 nm.
The water molecule consists of one oxygen atom bonded to two hydrogen atoms. The overall size of the water molecule is larger than the bond length due to the spatial arrangement of the atoms.
Based on typical molecular sizes, a water molecule is approximately around 3 × 10^-10 nm, which corresponds to option D.