Calcium carbonate equilibrium pressure must exceed total atmospheric pressure of 101 kPa, which happens at 898 °C. Calcium carbonate is poorly soluble in pure water (47 mg/L at normal atmospheric CO partial pressure as shown below). The equilibrium of its solution is given by the equation (with dissolved calcium carbonate on the right): where the solubility product for [Ca] [CO] is given as anywhere from "K" = 3.7×10 to "K" = 8.7×10 at 25 °C, depending upon the data source. What the equation means is that the product of molar concentration of calcium ions (moles of dissolved Ca per liter of solution)
International breastfeeding symbol public places. These signs need to be designed carefully because they need to be understood at a glance by most people without written descriptions explaining what they mean. The International Breastfeeding Symbol was created specifically to address the perceived problem of not having a universally accepted and understood symbol for breastfeeding available in public places. The modern iconography representing infancy usually involves artificial feeding or soothing objects, like a nurser bottle icon or pacifier symbol. Nursing rooms traditionally use a baby bottle symbol to designate what they are instead of a symbol of a mother nursing a child. The International