Answer:
C). Electronegativity.
Explanation:
'Electronegativity' is described as the tendency or a measure of the ability of an atom or molecule to attract electrons that leads to the formation of chemical bonds. It is denoted by 'χ', a Greek letter. The elements like Fluorine having a very high rate of electronegativity, its atom would attract the electrons more strongly while the elements with lesser electronegativity like Cesium would possess a lesser tendency to attract electrons towards it in order to form a bond. Thus, <u>option C</u> is the correct answer.
If,105.5mg sample of a white substance, suspected of being cocaine (C17H21NO4), forms 279.3mg of CO2 and 66.46mg of water on combustion, then we can conclude that the white solid is cocaine.
<h3>Types of Cocaine:</h3>
1. Pure Cocaine :
- Pure cocaine is type of crystalline powder which is derived from the leaves of the coca plant.
- Pure cocaine are very rare in the United States of America.
The product is often passes with the help of the supply chain.
2.Crack Cocaine :
- Crack cocaine are small in size and is a kind of rocky material.
- Depending upon it's purity they varies in color.
- Crack cocaine is generally used for smoking.
- it is also known as freebase cocaine.
3. Synthetic Cocaine :
- Synthetic forms of cocaine (also called as fake cocaine) are generally used as medicine in local areas.
- This product is looks like powdered material or crack cocaine.
4.Black Cocaine :
- Black cocaine is a chemically an another version of cocaine that is used to evade detection in body.
- It is usually a combination of cocaine, charcoal and some other chemicals.
- Black cocaine are not commonly used.
<h3> What is Combustion reaction?</h3>
A combustion reaction is a type of chemical reaction in which generally a fuel undergoes an oxidation by the reaction with the help of an oxidizing agent, which ,results in release of energy.
- it is generally an exothermic process.
- It reacts between oxidents and fuels.
- Solid fuels such as coal and wood are generally undergoes an endothermal pyrolysis.
- It results in the creation of fuels.
- The combustion of that types of gaseous fuels is generally used to provide the heat required which is required to accelerate more combustion.
Thus from the above conclusion we can say that, If,105.5mg sample of a white substance, suspected of being cocaine (C17H21NO4), forms 279.3mg of CO2 and 66.46mg of water on combustion, then we can conclude that the white solid is cocaine.
Learn more about Cocaine here: brainly.com/question/944545
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Answer:
Common environmental chemical pollutants include pesticides and herbicides, volatile organics (VOCs) such as benzene, toluene; and chloroform, heavy metals such as lead, mercury, and arsenic; air contaminants such as carbon monoxide, ozone, particulate matter (PM), and second hand smoke; and persistent organic pollutants, such as the dioxins, PCBs, and DDT. Environmental chemicals can cause a broad spectrum of effects, which depend not only on route of exposure and dose, but on the susceptibility of the recipient of the pollution
Answer:
To calculate the moles we must first find the molar mass M
M (Na2S2O8) = (23*2) + (32*2) + (16*8)
= 46 + 64 + 168
= 278g/mol
Molar mass = mass/moles
moles =mass / molar mass
= 25.2/278
= 0.0906mol
Hope this helps.
Answer:
Carbon Trioxide
Explanation:
Its a Carbonite Ion which is also known as a polyatomic ion
