Chapter 2, Problem 120A

Interpretation Introduction

Interpretation:

The mass of sodium ingested by a person needs to be determined if he takes 2.0 cups of the cereal per day. Also, the percent of daily recommended sodium or salt intake represented by it needs to be determined.

Concept introduction:

Nutrition is a science that interprets the nutrients and the other substances present in food essential for the maintenance, reproduction, growth, health of an organism. It includes absorption, ingestion, assimilation, biosynthesis, excretion and catabolism.

Answer to Problem 120A

$\text{0}\text{.43}\text{g}$ of Sodium or salt is the daily intake and the percent of intake of the salt is $19\%$.

Explanation of Solution

Given information:

The product contains $\text{160}\text{mg}$ of sodium (Na) in each serving.

From the given table, determine the amount of Sodium (Na) or salt by using the given nutritional information. There are $2$ cereal cups that must to be converted to the number of servings and each serving contains $\text{160}\text{mg}$ of sodium or salt. Then, the last step is to convert the milligrams (mg) to grams (g).

$\begin{array}{c}\text{Grams}\text{of}\text{salt}=\text{2}\text{.0}\text{cups}\text{cereal}\times \left(\frac{\text{1}\text{.0}\text{serving}}{\text{0}\text{.75}\text{cups}\text{cereals}}\right)\times \left(\frac{\text{160}\text{mg}\text{salt}}{\text{1}\text{.0}\text{serving}}\right)\times \left(\frac{\text{0}\text{.001}\text{g}}{\text{1}\text{mg}}\right)\\ =\text{0}\text{.43}\text{g}\text{salt}\end{array}$

To calculate the percent of daily recommended salt or sodium intake, multiply the amount of salt previously calculated (in mg) by $7$ percent and divide by $\text{160}\text{mg}$.

$\begin{array}{c}\text{\%}\text{salt}\text{intake}=\left(\text{430}\text{mg}\right)\times \left(\frac{\text{7}\text{percent}}{\text{160}\text{mg}}\right)\\ =19\%\end{array}$

Hence, the percent of daily-recommended salt or sodium intake is $19\%$.

Conclusion

Thus, $\text{0}\text{.43}\text{g}$ of Sodium or salt is the daily intake and the percent of intake of the salt is $19\%$.