Concrete is measured by the cubic yard - measuring three feet by three feet by three feet, or 27 cubic feet. One cubic yard of normal concrete will weigh about 4,000 pounds. (Content provided by the Mineral Information Institute, Â© 2002 www.mii.org) No. Concrete is made by mixing cement, aggregates and water together.
Hydroxycitric acid (HCA), a derivative of citric acid, is found primarily in a small, sweet, purple fruit called the Malabar tamarind or, as it is most commonly called, Garcinia cambogia.hat Is the Scientific Evidence for Hydroxycitric Acid? It remains unclear whether HCA offers any weight-loss benefits. In an 8-week double-blind, placebo-controlled trial of 60 overweight individuals, use of HCA at a dose of 440 mg 3 times daily produced significant weight loss as compared to placebo.
Answer: Hydrofluoric acid or HF is an extremely corrosive acid. However, it is a weak acid and not a strong acid because it does not completely dissociate in water (which is the definition of a strong acid) or at least because the ions it forms upon dissociation are too strongly bound to each other for it to act as a strong acid. Why Hydrofluoric Acid is a Weak Acid. Hydrofluoric acid is the only hydrohalic acid (e.g., HCl, HI) that is not a strong acid. Hydrogen fluoride does actually dissolve fairly freely in water, but the H3O+ and F- ions are strongly attracted to each other and form the strongly bound pair, H3O+ Â· F-.