Is copper an element, a compound, or a mixture? Explain. What is sodium made of? Which alloy of aluminum is used for making magnets? How are the pure metals prepared? In your own words, how would you define chemistry? What are "chemicals" and what do "chemists" do?
Is air classified as an element, a compound, or a mixture? Explain. In chemistry, what does "aq" mean? What is meant by the "endpoint" of a titration? Why the elements of group III-A to group VII-A are called p-block elements?
Graphite is a brittle steel black coloured compound that is used in several different industrial inductor processes as well as in the lady for your pencil. To make graphite in the lab we need the flowing material 1) 10- 15 gram of sucrose, 2) 10 mils of 18 molars sulphuric acid, 3) 1...
in his 1665 bookThe Sceptical Chymist, he proposed that an element was a substance that could not be reduced (‘analysed’) to something simpler. But Boyle’s definition only tells youwhenyou have an element, and not what an element is and what distinguishes one from another. And it is h...
In the lumped-element model, it can be represented as a series connection of a resistor and capacitor (or multiple instances thereof) in parallel with a device’s nominal capacitance. Practically, this means that a capacitor held at DC potential for some length of time and then briefly ...
Thermally expandable graphites are becoming increasingly popular as intumescent fire retardants for polymeric systems due to their excellent thermal and barrier properties. Therefore, it is important to understand their thermal degradation pathways and monitor products for any that may be toxic or affect ...
The bioaccumulation of compounds in algal biomass has also been applied to take up PCBs; the compound was taken up into the cell organelles, as well as attached to the surface of the cell (Jabusch & Swackhamer, 2004). Algae are good accumulators of industrial compounds like organochlorides an...
The definition of an element given above is an operational one; a certain result (or in this case, a non-result!) of a procedure that might lead to the decomposition of a substance into lighter units will tentatively place that substance in one of the categories, element or compound. Becau...
Crystalline solids are materials in which the atoms or molecules form an ordered array of points. They have a defined shape and they generally do not compress when an external force is applied to them.Answer and Explanation: Become a member and unlock all Study Answers Start today. Try it ...
Is gasoline an element, a compound, or a mixture? Explain. For the element Ca, what will the signal be in 1 ppm standard at 3000 K? In the industrial process of manufacturing ammonia, which two elements are mainly used? Coke, which is used in the purification of metal from metal oxides...