The words “molecule” and “compound” get thrown around very casually, often interchangeably, in any conversation about chemistry or material sciences. There is a good reason for this—the formal definitions are very nuanced, and there is some overlap, as well as debate about the boundaries of...
A 3.50-gram sample of CH4 is burned in a calorimeter. The calorimeter is filled with 35.0 grams of water with a specific heat of 4.184 J/gC. The temperature of the calorimeter increases from 25.0 C to 30.0 C. Calculate the energy lost or gained by the rea ...
Valence is a broader concept that includes the atom's bonding capacity, types of bonds, and resulting structures, while valency specifically refers to the fixed number of electrons involved in bonding. 13 What is valence in chemistry? Valence refers to an atom's capacity to bond with other ato...
Global warming is a multi-faceted problem. It even involves chemistry. A clathrate is aninclusion complex. This is a kind of compound in which a molecule is completely enclosed by another substance. It is for this reason that a clathrate is at times called a “cage compound.” Global Warmin...
What is the volume (in liters) of 36.0 grams of CH4 at STP? What is the measure of how close a measurement is to the actual, exact value called? Calculate the volume of 200 g of H_2. The basic metric unit for volume is the: a. gram b. liter c. centimeter d. inch ...
(1998) recognized the need to explain the N sink in soils. The fact that soil microorganisms remained strong sinks called the attention to mycorrhizal fungi, which receive fresh carbohydrates from the trees. Attention was thus paid to trenching experiments, which disrupt the flow of C from trees...
Which of the following is NOT a hydrophobic substance? Explain. C2H6 (Ethane) C3H8 (Propane) C6H6 (Benzene) CH4 (Methane) CH3CO2H (Acetic Acid) What is an alkyl group in organic chemistry? What is ario in organic chemistry? Which lipids are the least polar? What is benzene in organic ...
What is the empirical formula for iron oxide?Iron Oxide:Iron oxide, also called ferrous oxide, forms when the metal iron reacts with oxygen in the atmosphere. Most people are familiar with iron oxide as rust, but it can also be found in the body, helping to form the hemoglobin we need...
because as it has no direct emissions. Ozone results from a subtle chemistry taking place in the air, involving “precursors” which are regular pollutants – NOx, hydrocarbons – with the help of sun rays. Calculating – even roughly – the amount of ozone emitted by a country is today cle...
I have been working on Milankovitch Theory for about three years, trying to understand it. In doing so, I have gained some new insights into this theory. I have also discovered that there are some misconceptions about what it is. This brief note summarizes my work while clarif...