alleryStart learning →Aspirin has the molecular formula C9H8O4. With C = 12.01, H = 1.008 and O = 16.00 amu, what is its molecular mass?
A180.15 amu
B116.15 amu
C108.09 amu
D244.15 amu
Answer & Solution
Correct answer: A. 180.15 amu
1. Carbon contributes 9 x 12.01 amu = 108.09 amu.
2. Hydrogen contributes 8 x 1.008 amu = 8.064 amu.
3. Oxygen contributes 4 x 16.00 amu = 64.00 amu.
4. The total is 108.09 + 8.064 + 64.00 = 180.15 amu.
5. The value 116.15 amu is what you get if the oxygen atoms are left out of the sum.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 3 "Composition of Substances and Solutions", section 3.1 Formula Mass and the Mole Concept_
Keep practising Composition of Substances and Solutions
Browse all Composition of Substances and Solutions questions for IMU CET, or explore more Chemistry topics.
Related questions
Which quantity is needed on top of a solution's volume and mass percentage to find the solExpress a mercury concentration of 9.6 ppm in parts per billion.A 50.0 g sample of industrial wastewater contains 0.48 mg of mercury. What is the mercury At a lead level of 15 ppb, what mass of lead is in a 300 mL glass of water of density 1.00A lead concentration in tap water of 15 ppb is equal to what concentration in ppm?What maximum safe level of fluoride ion in tap water has the EPA identified?How are the mass-based ppm and ppb units defined?In what units is the concentration of glucose in blood usually reported?