The boiling point of an element or compound is the set temperature at which it will transition from a liquid state to a gaseous state. The boiling point is always higher than the melting point, which is the temperature at which the substance transitions from a solid to a liquid....
a) To purify an impure liquid. b) To purify an impure solid. c) The melting point of a compound is depressed over a wide range. d) The me What is the key difference that determines whether materials have chemically reacted with each other or...
Calculating the Molar Mass of a Compound:In order to calculate the molar mass of any compound, we only need to know what elements are contained in the compound and what the molar mass of the elements are.Answer and Explanation: The molar mass of sucrose is 342.2965 g/mol. Let's look ...
Selenium is an essential element in human diets but the risk of suboptimal intake increases where food choices are narrow. Here we show that suboptimal dietary intake (i.e. 20–30 µg Se person−1 d−1) is widespread in Malawi, based on a spatial integration of Se concentrat...
Sealed and desiccated optics lowers maintenance costs Standard KBr/BaF2 anti-hygroscopic coating, protective windows Automatic atmospheric suppression removes water and carbon dioxide from spectra, with no need to select a reference spectrum. • User rechargeable desiccant canister and humidity inspection ...
The scientific method has been created by humans and as a human institution is never completely perfectly impelemented. Science and scientists are not completely free of prejudice and hubris. The history of science is littered with concepts that in retrospect should never have been other than ...
Potassium permanganate is a chemical compound that is used to treat various skin problems. Potassium permanganate combines the manganese oxide ore with potassium hydroxide. However, it was developed in 1857 as a disinfectant.Answer and Explanation: ...
Is water classified as a pure substance (element or compound) or a mixture? Explain. Distinguish between the terms solute and solvent. What is the difference between dissolution and dissociation? What substances can affect water's boiling point? What is the definition of a pure substance and ...
Boiling Point: The boiling point of an element is the temperature at which a liquid form of the element will transition to a gaseous form at standard atmospheric pressure. The boiling point is always higher than the melting point for an element. ...
the efficiency of incorporation depends on pI of the bioactive agent and pH of the coating solution. The pI of a compound can be measured by isoelectric foccussing e.g. on a gel. Preferably the bioactive agent is charged at the pH at which the device is coated according to the invention...