Question

how many C atoms are present in 34.2g of sucrose (c12 H22 O11)Mr=342)
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Answer 1

Answer:

Number of moles of sucrose =  

Molarmass

Givenmass

​

=

342.3

25.6

​

=0.074 mol

Number of sucrose molecules in 1 mol = 6.022×10

23

Number of sucrose molecules in 0.074 mol = 6.022×10

23

×0.074=4.503×10

22

Number of hydrogen atoms in 1 molecule of sucrose = 22

Therefore, Number of hydrogen atoms in 4.503×10

22

 molecules = 22×4.503×10

22

 = 9.91×10

23

Explanation: