HRS - Ask. Learn. Share Knowledge. Logo

Questions in chemistry

[Done] 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)

[Done] 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.

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

[Done] 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.

[Done] How many atoms are there in one molecule of hexane? A. six B. ten C. twelve D. twenty

[Done] Which of the following cannot pass across the placenta? A. Oxygen B. Waste materials C. Blood D. Nutrients

[Done] What is the name given to the property of metal that allows electricity to pass through?

[Done] A company is designing a new range of saucepans. The base of the saucepan should conduct heat well and evenly, while the handle should be a good insulator. Which one of the following lists of substances would be the most appropriate for these tasks? Base | Handle ---|--- (a) aluminium | aluminium (b) copper | plastic (c) glass | glass (d) plastic | copper

[Done] A typical neon light contains neon gas mixed with argon gas. If the total pressure of the mixture is 1.63 atm and the partial pressure of the neon is 0.71 atm, what is the partial pressure (in atm) of argon?

[Done] A pure substance is found to be a good conductor of electricity in both its solid and liquid phases. The bonding in the substance is which one of the following? (a) ionic (b) covalent molecular (c) metallic (d) covalent network