Chemical Reaction Quizzes Online & Trivia

Pb(NO3)2 + 2 KI ---> PbI2 + 2 KNO3what constitutes this reaction ?

Why is it exothermic it has a positive energy energy is getting absorbed so therefore shouldn't the energy level increase?

In science, a true solution deals with the type of mixture and how it is dissolved. Also, it also has to comply with the measurements of the particle size. Specifically, a true solution’s particles can’t be larger than one nanometer. It also must be a homogeneous mixture. This means that at least two substances are mixed together and their particles are spread evenly or uniformly throughout the mixture. The opposite of that is called heterogeneous and this means that the particles are not spread evenly throughout the mixture. There are many examples of a true solution, but probably the most common is a sugar and water solution. When mixed thoroughly, the sugar dissolves into the water. If you drank it, the water would consistently taste sweet due to the sugar.

There are no actual answers here - just A, B, C, and D, where answer A reads “A”, answer B reads “B”, and so on. There are no diagrams, no descriptions. This makes it impossible to say for certain what the actual answer should be. However, this shouldn’t be that hard for someone who is good at chemistry to figure out. Since I am not that particularly good at chemistry, I will not attempt to answer this question without a sufficient answer on the list. I would implore the first answerer to expand on how they know it is answer “D” without anything else on the answer list, not only for my benefit, but for the benefit of those who come to this question after me.

The correct answer to this question is D, 0.96 M. The given equation and chart can help us solve this question. Along with using the equation and table, it is helpful for the person answering the question to know the meaning of the terms in the question. The term concentration is the amount of a substance that is in space. The term Volume is how much liquid, solid, or gas occupies a space. This type of question would be found on a chemistry test. Due to its difficulty, it could also be found on an IQ test to test one's intellect.

The correct answer to this question is B, hydrolysis. This is defined as a chemical breakdow of a compound, formed from a reaction with water. The word hydrolysis comes from Ancient Greek, where hydro means water and lysis means to unbind. During this process, water molecules are seperated into hydrogen and oxygen atoms. This is done by using electricity. There are many different types of hydrolysis'. One includes salt. It occurs when a salt of either a weak acid or base dissolves into water. There is also hydrolyses of amides, which happens when the nucelophile attacks a carbon of the amide.

The Retro-Diels-Alder Reaction. The Retro-Diels–Alder reaction (RDA) is the second microscopic reversed reaction of the Diels–Alder reaction—the formation of a diene and dienophile from a cyclohexene. It can spontaneously be accomplished with heat, or acid or base mediation. With the right and the appropriate driving force, the Diels–Alder reaction proceeds in reverse, providing diene and dienophile from starting cyclohexene derivatives. This process was known and applied to the detection of cyclohexadienes as early as the year 1929. After reacting with acetylenes through a Diels–Alder/retro-Diels–Alder sequence, it released ethylene and aromatic compounds.

A process where a sugar is broken down into ethanol and carbon dioxide

Option C - mass Mass doesn't change in physical or chemical change. Physical change are changes that affect the form of a substance. Example is the change in the state of water from solid to liquid and to ice. Chemical change is a type of change that occurs when a substance is changed from one form to another form that cannot be reversed. Chemical composition changes in chemical change. Density and shape change in physical change, shape and arrangement of particles change in chemical change. Remember the law of conversation of mass, that states that mass is neither created nor destroyed in physical or chemical change.

Intensive property is defined as independent on the amount, which means it doesnt depend on the amount. For example, density, boiling point, freezing point and melting point

I believe it is Endothermic

Acid, lb/d = (mg/L alkalinity reduction as CaCO3)(BD, gpm)(8.34 lb/gal)(1440 min/d)/(1000000 mg/L) = 3508.341440/10^6 = 84 pounds per day.