Frictional force plays an important role in our daily life. A running car or bicycle uses friction to stop. As the driver steps on the breaks,... View Article
Answer: The name plaster of Paris came from the fact that it was first of all made by heating gypsum which was mainly found in Paris. The... View Article
Answer: Current is the aggregate flow of electrons through a wire and can be defined as the rate of electron flow. Resistance is defined as an... View Article
The net ionic equation for the overall reaction that occurs when aqueous solutions of sodium hydroxide and oxalic acid (H2C2O4) are combined and... View Article
The structure proposed by Kekule was unable to explain the following facts. The Kekule structure predicts that there should be two different... View Article
Aluminum Chloride (AlCl3) figures among the most used Lewis acids and is one of the most powerful as well. Widely used as a catalyst, this... View Article
Recall Bohr's atomic model theory. The Bohr Model of the Atom In 1911 at the age of 25, Niels Bohr received his Ph.D. in physics. He was... View Article
X-rays are a form of ionizing radiation. They are high-energy photons (electromagnetic radiation) released when inner shell electrons that have... View Article
Both aldehydes and ketones are organic compounds with carbonyl functional groups, but they have different molecular structures. In methanol... View Article
According to Kekule, six carbon atoms of benzene are linked to each other by alternate single and double covalent bonds to form a hexagonal ring.... View Article
Liquid nitrogen is probably the most promising non-polar inorganic compound. Liquid nitrogen begins to boil when exposed to air. The steam around... View Article
The vapor pressure of liquid aluminum is 400 mm Hg at 2.59 x 103 K. Assuming that its molar heat of vaporization is constant at 296 kJ/mol, the... View Article
A limiting reactant or limiting reagent is the reactant that is completely consumed in a reaction. The reaction stops as soon as the limiting... View Article
Consider In a closed container there are 1,962 molecules of C4H10 and 11,700 molecules of O2. The following are the steps to determine the... View Article
White phosphorus is an extremely reactive element. White phosphorus ignites spontaneously in chlorine and reacts violently with the halogens.... View Article
In chemistry, the mole is a fundamental (SI) unit used to measure the amount of substance. This quantity is sometimes referred to as the chemical... View Article
Compounds are represented by chemical formulas. A chemical formula shows the elements that make up the compound and the numbers of atoms of each... View Article
The incident ray AB and the refracted ray BC and the perpendicular of B to the surface separating the two media Mo and M1 lie in the same plane.... View Article
The minimum retarding means the negative potential of the anode of a photoelectric tube for which photoelectric current stops or becomes zero is... View Article
Non-metals are minerals which, as a rule, do not serve as a raw material for the extraction of metal. Some of the uses of non-metals are listed... View Article
