Answer:
Celsius +273.15
Explanation:
The two scales have the same size degree, but Kelvin is an absolute scale based on absolute zero while 0° in Celsius is based on the melting point of water. So, in order to convert from Celsius degrees to Kelvin we only need to add 273.15 to the given temperature:
K= °C + 273.15
Answer:
Silver tarnishes and becomes black when exposed to oxygen:
Diesel fuel burns when it is heated:
Explanation:
Chemical Changes are those changes in which the chemistry at molecular level is changed as the starting material is converted in to a new and different final material. This change takes place with the breaking of old bonds and forming of new bonds respectively.
Silver tarnishes and becomes black when exposed to oxygen:
This is a chemical change as Silver a white and lustrous starting material is being converted into a tarnish black final material. However, Silver doesn't readily react with oxygen at normal conditions. It readily react with Sulfur containing compounds in air and produces black compound as Ag₂S.
Diesel fuel burns when it is heated:
Diesel is a mixture of hydrocarbons ranging approximately from C₁₀H₂₀ to C₁₅H₂₈. When these hydrocarbons are burnt they produces a new materials i.e. CO₂ and H₂O.
C₁₀H₂₀ + 15 O₂ → 10 CO₂ + 10 H₂O
Hence, it is also a chemical reaction.
Answer:
Stereoisomers that are not mirror images of each are <u>diasteroisomer</u> . The chemical and physical properties of two <u>diasteroisomers</u> are different. Isomers that differ only in the way atoms are oriented in space are <u>Stereoisomers</u> . Achiral compounds that contain tetrahedral stereogenic centers are <u>meso</u> <u>isomers</u> . Isomers that differ in the way the atoms are connected to each other are <u>structural</u> <u>isomer</u> . Stereoisomers that are nonsuperimposable mirror images of each other are <u>enantiomers</u> . The chemical and physical properties of two <u>enantiomers</u> are identical except in their interaction with chiral substances.
Explanation:
Diasteroisomers are differentiated by the spatial arrangement of atoms, but they are not specular images so they are not enantiomers. In order for two molecules to be diastereoisomers, they must have at least two chiral centers. In one of the centers the substituents are arranged equally in both molecules and in the other they must change.
Enantiomers are specular images but are not superimposable. They have the ability to rotate the polarized light plane
The stereoisomers present the same molecular formula but different spatial rearrangement between their atoms, we can mention the cis and trans isomers where the cis isomers are on the same side of the plane and the trans isomers on opposite sides. They are also known as geometric isomers.
Meso compounds always have more than one asymmetric center and are aquiral. They are distinguished because they present a plane of symmetry.
Structural isomers are those that have different connectivity between their atoms. We can differentiate, for example, metoximethane from ethanol. They will always have the same molecular formula.
Answer:
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Explanation:
Any substance that inhibits the growth and replication of a bacterium or kills it outright can be called an antibiotic. Antibiotics are a type of antimicrobial designed to target bacterial infections within (or on) the body. This makes antibiotics subtly different from the other main kinds of antimicrobials widely used today:
Antiseptics are used to sterilise surfaces of living tissue when the risk of infection is high, such as during surgery.
Disinfectants are non-selective antimicrobials, killing a wide range of micro-organisms including bacteria. They are used on non-living surfaces, for example in hospitals.
Of course, bacteria are not the only microbes that can be harmful to us. Fungi and viruses can also be a danger to humans, and they are targeted by antifungals and antivirals, respectively. Only substances that target bacteria are called antibiotics, while the name antimicrobial is an umbrella term for anything that inhibits or kills microbial cells including antibiotics, antifungals, antivirals and chemicals such as antiseptics.
Most antibiotics used today are produced in laboratories, but they are often based on compounds scientists have found in nature. Some microbes, for example, produce substances specifically to kill other nearby bacteria in order to gain an advantage when competing for food, water or other limited resources. However, some microbes only produce antibiotics in the laboratory
Answer:
1.It is used as a cleaning agent and can be used to remove stains or clean mirrors, tubs, sinks, windows and more.
1.It is used as a cleaning agent and can be used to remove stains or clean mirrors, tubs, sinks, windows and more. 2.it is use in agriculture
1.It is used as a cleaning agent and can be used to remove stains or clean mirrors, tubs, sinks, windows and more. 2.it is use in agriculture 3.ir is also used as a refrigerant gas, for purification of water supplies, and in the manufacture of plastics, explosives, textiles, pesticides, dyes and other chemicals. It is found in
