Question

Arabic coffee, or “Qahwah” is a very important drink in the Gulf region and in the Middle East generally. It refers to a version of brewed coffee beans that contains spices like cardamom and saffron. Qahwah is usually consumed without sugar. Finjan is a small delicate cup (typically of 25 mL volume) that is traditionally used to serve this Arabic coffee. During celebrations and gatherings, half-filled Finjans of Arabic coffee are served several times to guests. An average Finjan contains about 4.10 mg of caffeine, C8H10N4O2. How many molecules of caffeine are there in a half-filled Finjan?

• A. $3.07\times {10}^{24}molecules$
• B. $2.52x{10}^{19}molecules$
• C. $1.27x{10}^{19}molecules$
• D. $6.32x{10}^{18}molecules$

Answer 1

The correct option is D $6.32x{10}^{18}molecules$

$6.32x{10}^{18}molecules$