When an element undergoes a chemicalchange, the alterations occur within the atoms of the cell itself.
Chemicalchanges occur when one substance combines with another to form a new substance, which is known as chemical synthesis, or when two or more different substances combine to form a new substance, which is known as chemicaldecomposition.
These processes are known as chemical reactions, and they are generally irreversible except through further chemical reactions.
One can understand and explain the way the natural world works by observing chemical reactions.
Chemical reactions convert food into fuel for the body, cause fireworks to explode, cause food to change when cooked, cause soap to remove grime, and many other things.
Chemical changes are considered unseen because the alterations made within an element during a chemicalchange occur within the atoms of the cell itself.
Thus, the the chemicalchange is unseen.
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Hydrogen: 6.478%
Carbon: 42.106
(C*12)+(H*22011)=505.272+142587.258=143092.53
such as platinum and palladium, can greatly
increase the rate of this reaction. During this
process, the gaseous reactants are pumped
across a layer of metal powder. An example of this
process is shown below.
Describe how the metal probably increases the
reaction rate, identify whether this is an example of
homogeneous or heterogeneous catalysis, and
explain how you know.
A reducible molecule undergoes hydrogenation when hydrogen is added to it. Alkenes, alkynes, and aromatic molecules that are unsaturated are converted into saturated products through the hydrogenation of hydrocarbons.
A chemical reaction known as hydrogenation occurs when molecular hydrogen interacts with another substance or element, typically in the presence of a catalyst made of nickel, palladium, or platinum. The method is frequently used to saturate or decrease organic molecules.
With the aid of nickel or palladium catalysts, unsaturated hydrocarbons are added to hydrogen in this process to create saturated hydrocarbons. Example: Applying an addition reaction to ethane in the presence of catalysts like nickel or palladium allows for the conversion of ethane.
When making plastics, unsaturated hydrocarbons are incredibly helpful organic substances. Egg cartons, disposable cups, and other practical things are made of polystyrene. Alkenes are utilized in the production of industrial compounds like alcohol.
Thus, A reducible molecule undergoes hydrogenation when hydrogen is added to it.
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Answer: The metal probably increases reaction rate by either holding reactant molecules in the correct orientation to react or by weakening or breaking bonds in reactant molecules to make them more reactive. This is an example of heterogeneous catalysis.
Explanation: It is heterogeneous catalysis because the catalyst is a solid and the reactants are gases. In heterogeneous catalysis, the catalyst is in a different phase than the reactants.
Answer:
ethanol is already at the ethanol's boiling point: (0.826 kJ/g) x (70.05 g) = 57.8613 kJ = 5.79 x 10^4 J.
Missing: 45.65 | Must include: 45.65
Explanation:
Answer:
Explanation:
Supposing the temperature of the ethanol is already at the ethanol's boiling point:
(0.826 kJ/g) x (70.05 g) = 57.8613 kJ = 5.79 x 10^4 J
Answer:
The mechanical weathering is defined as the breaking down of rocks physically due to the agents such wind, water and ice. In addition this, plant roots, abrasion, rainfall and temperature also plays an important role in wearing away the rocks.
When water, wind flows over the rock surfaces, it erodes the rocks and this is known as the abrasion process. The broken particles (sediments) are transported by these agents and deposited at some other place.
The rocks also undergoes deformation due to the frost wedging process, freeze and thaw method, exfoliation and some other process.
These are the processes that are responsible for mechanical weathering.