Table 2.1 $${ } _ { 8 } ^ { 16 } \mathrm { O } \quad { } _ { 6 } ^ { 12 } \mathrm { C } \quad { } _ { 1 } ^ { 1 } \mathrm { H }$$
Using the information in Table 2.1,calculate the molecular weight of ethanol,C₂H₅OH.

Question

Quizplus · Accepted Answer

The molecular weight of ethanol,C₂H₅OH is calculated by summing up the atomic weights of all atoms in the molecule. Using the information in Table 2.1, we can find the atomic weight of each element:

- Atomic weight of two carbon atoms: 2 x 12 = 24
- Atomic weight of six hydrogen atoms: 6 x 1 = 6
- Atomic weight of one oxygen atom: 1 x 16 = 16

Then, we add them up: 24 + 6 + 16 = 46, which is the molecular weight of ethanol. Therefore, the answer is B.

Table 21 816O612C11H{ } _ { 8 } ^ { 16 } \mathrm { O } \quad { } _ { 6 } ^ { 12 } \mathrm { C } \quad { } _ { 1 } ^ { 1 } \mathrm { H }816​O612​C11​H

Table 21 ${ } _ { 8 } ^ { 16 } \mathrm { O } \quad { } _ { 6 } ^ { 12 } \mathrm { C } \quad { } _ { 1 } ^ { 1 } \mathrm { H }$