Domanda del libro di testo
Determine the number of moles of hydrogen atoms in each sample. a. 0.0885 mol C4H10 b. 1.3 mol CH4
3429
views
Ch.3 - Molecules and Compounds
Tro5th EditionChemistry: A Molecular ApproachISBN: 9780134874371
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch.1 - Matter, Measurement & Problem Solving117
- Ch.2 - Atoms & Elements106
- Ch.3 - Molecules and Compounds128
- Ch.4 - Chemical Reactions and Chemical Quantities56
- Ch.5 - Introduction to Solutions and Aqueous Solutions84
- Ch.6 - Gases112
- Ch.7 - Thermochemistry96
- Ch.8 - The Quantum-Mechanical Model of the Atom60
- Ch.9 - Periodic Properties of the Elements86
- Ch.10 - Chemical Bonding I: The Lewis Model91
- Ch.11 - Chemical Bonding II: Molecular Shapes, VSEPR & MO Theory85
- Ch.12 - Liquids, Solids & Intermolecular Forces51
- Ch.13 - Solids & Modern Materials48
- Ch.14 - Solutions93
- Ch.15 - Chemical Kinetics114
- Ch.16 - Chemical Equilibrium68
- Ch.17 - Acids and Bases137
- Ch.18 - Aqueous Ionic Equilibrium154
- Ch.19 - Free Energy & Thermodynamics91
- Ch.20 - Electrochemistry105
- Ch.21 - Radioactivity & Nuclear Chemistry74
- Ch.22 - Organic Chemistry141
Tro5th EditionChemistry: A Molecular ApproachISBN: 9780134874371Non è quello che usi tu?Cambia libro di testo
Capitolo 3, Problema 77
The iodide ion is a dietary mineral essential to good nutrition. In countries where potassium iodide is added to salt, iodine deficiency (or goiter) has been almost completely eliminated. The recommended daily allowance (RDA) for iodine is 150 mg/day. How much potassium iodide (76.45% I) should you consume if you want to meet the RDA?
Guida verificata passo dopo passo1
Identify the percentage of iodine in potassium iodide, which is given as 76.45%.
Determine the amount of iodine needed per day, which is 150 mg according to the RDA.
Set up a proportion to find the amount of potassium iodide needed to provide 150 mg of iodine. Use the formula: \( \text{Amount of KI} = \frac{\text{RDA of Iodine}}{\text{Percentage of Iodine in KI}} \).
Substitute the known values into the formula: \( \text{Amount of KI} = \frac{150 \text{ mg}}{0.7645} \).
Solve the equation to find the amount of potassium iodide needed to meet the RDA for iodine.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
3mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Iodine and Its Importance
Iodine is an essential trace element necessary for the synthesis of thyroid hormones, which regulate metabolism, growth, and development. A deficiency in iodine can lead to health issues such as goiter and hypothyroidism. The recommended daily allowance (RDA) for iodine is 150 micrograms for adults, highlighting its critical role in human health.
Video consigliato:
Percorso guidato
01:34
The greater the interaction between the metal and its ligands then the greater the energy of its d orbitals
Potassium Iodide Composition
Potassium iodide (KI) is a compound that provides iodine in a bioavailable form. It consists of potassium and iodide ions, with iodide being the active form that the body utilizes. The percentage of iodine in potassium iodide (76.45%) indicates that for every 100 grams of KI, 76.45 grams is iodine, which is crucial for calculating the amount needed to meet the RDA.
Video consigliato:
Percorso guidato
04:19Matter Composition
Calculating Dosage from Composition
To determine how much potassium iodide is needed to meet the iodine RDA, one must use the composition percentage of iodine in KI. By setting up a proportion based on the RDA and the percentage of iodine in KI, one can calculate the required mass of potassium iodide. This involves basic algebraic manipulation to ensure the correct dosage is consumed to meet nutritional needs.
Video consigliato:
Percorso guidato
04:19Matter Composition
Pratica correlata
Domanda del libro di testo
Iron in the earth is in the form of iron ore. Common ores include Fe2O3 (hematite), Fe3O4 (magnetite), and FeCO3 (siderite). Calculate the mass percent composition of iron for each of these iron ores. Which ore has the highest iron content?
1469
views
Domanda del libro di testo
Silver chloride, often used in silver plating, contains 75.27% Ag by mass. Calculate the mass of silver chloride required to plate 155 mg of pure silver.
4134
views
1
comments
Domanda del libro di testo
Copper(II) fluoride contains 37.42% F by mass. Calculate the mass of fluorine (in g) in 55.5 g of copper(II) fluoride.
3694
views
Domanda del libro di testo
Write a ratio showing the relationship between the molar amounts of each element for each compound. (See Appendix IIA for color codes.) (a)
577
views
Domanda del libro di testo
The American Dental Association recommends that an adult female should consume 3.0 mg of fluoride (F-) per day to prevent tooth decay. If the fluoride is consumed in the form of sodium fluoride (45.24% F), what amount of sodium fluoride contains the recommended amount of fluoride?
1423
views