Multiple Choice
Which of the following is the correct molecular formula for glucose?
24
views
3. Chemical Reactions
Molecular Formula
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many oxygen atoms are present in one molecule of H_2O?
A
2
B
1
C
0
D
3
Verified step by step guidance1
Identify the chemical formula of the molecule given, which is H_2O. This formula represents water.
Understand that the subscript number following an element symbol indicates the number of atoms of that element in one molecule.
In H_2O, the subscript '2' after H means there are 2 hydrogen atoms, and the absence of a subscript after O means there is 1 oxygen atom.
Therefore, count the oxygen atoms by noting the subscript for O, which is implicitly 1 when no number is shown.
Conclude that one molecule of H_2O contains exactly 1 oxygen atom.
2:08mWatch next
Master Determining Molecular Formulas with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Molecular Formula practice set
Problem sets built by lead tutorsExpert video explanations