leadrebel - Smart Answers. Smarter Community. Logo

Questions in chemistry

📝 Answered - Which compound yields \( \text{H}^+ \) ions as the only positive ions in an aqueous solution? 1. \( \text{KOH} \) 2. \( \text{NaOH} \) 3. \( \text{CH}_3\text{OH} \) 4. \( \text{CH}_3\text{COOH} \)

📝 Answered - The concentration of a solution can be expressed in: 1. Milliliters per minute 2. Parts per million 3. Grams per Kelvin 4. Joules per gram

📝 Answered - Calculate the number of oxygen atoms in 2.00 moles of [tex]$Mn_2O_7$[/tex].

📝 Answered - As water evaporates from an open container at 40°C, which one of the following is true? A. The water becomes warmer as the kinetic energy of the liquid water molecules increases. B. The water molecules decompose into hydrogen and oxygen molecules. C. The water molecules return to the surface as fast as they leave. D. The water vapor molecules have greater kinetic energy than the liquid water molecules.

📝 Answered - Consider the following 1.0 mol L\(^{-1}\) solutions. Which one of the following lists the solutions in decreasing order (that is, strongest to weakest) of electrolyte strength? A. Sodium phosphate > sulfuric acid > phosphoric acid > sucrose (sugar) B. Sucrose (sugar) > sulfuric acid > phosphoric acid > sodium phosphate C. Sulfuric acid > sodium phosphate > phosphoric acid > sucrose (sugar) D. Sodium phosphate > phosphoric acid > sulfuric acid > sucrose (sugar)

📝 Answered - I've been given the formula C\(_5\)H\(_{12}\)O. I need to determine the structure and IUPAC name by looking at the IR, proton NMR, and carbon NMR.

📝 Answered - Is iodine a liquid? If yes, then why is bromine the only non-metal typically listed as a liquid?

📝 Answered - Which one of the following statements about absolute zero is correct? A. At absolute zero, the volume of an ideal gas is zero. B. At absolute zero, ideal gases freeze to give solids. C. At absolute zero, solid and liquid water are at equilibrium. D. Absolute zero is the lowest temperature so far reached in the laboratory.

📝 Answered - How many atoms are there in one molecule of hexane? A. six B. ten C. twelve D. twenty

📝 Answered - Which of the following cannot pass across the placenta? A. Oxygen B. Waste materials C. Blood D. Nutrients