Question

12 question (2 points) open ebook section 1.9 1st attempt see hint large doses of vitamin c are supposed to cure the common cold. one commercial over - the - counter product consists of 500.0 - mg tablets that are 20.0% by weight vitamin c. how many tablets should one take for a 0.77 g dose of vitamin c? assume that the tablets can be accurately divided. therefore express your answer to the correct number of significant figures. tablets

Explanation:

Step1: Convert dose to mg

Since 1 g = 1000 mg, then 0.77 g of vitamin C is $0.77\times1000 = 770$ mg.

Step2: Calculate mass of vitamin C in one tablet

The tablet has a mass of 500.0 mg and is 20.0% vitamin C by weight. So the mass of vitamin C in one tablet is $500.0\times0.200=100$ mg.

Step3: Calculate number of tablets

To find the number of tablets, divide the total required dose of vitamin C by the mass of vitamin C in one tablet. So the number of tablets $n=\frac{770}{100}=7.7$.

Answer:

7.7