The difference between a molecule and a compound is that a compound is made up of atoms from .A chemical change creates a new
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Answer:
Explanation:
The difference between the molecule and compound is that molecule is made up of atoms of same element while compound is made up of atoms from different elements.
Molecule:
When the atoms of same elements combine they form molecule. In molecule atoms are combined together by covalent bond.
For example,
H₂ is the molecule of hydrogen in which two hydrogen atoms combined together through covalent bond.
Compound:
When the atoms of different elements combine they form compound. In compound atoms are combined through ionic bond.
For example,
NaCl is compound it is formed by the combination of atoms of sodium and chlorine. The electron form sodium is gained by the chlorine and form ionic bond.
2) A chemical change creates a new species.
Chemical change:
The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.
These changes are irreversible
These changes occur due to chemical reactions
These may not be observed with naked eye
Example:
Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood
Boiling of egg: that change the chemical composition of protein in the egg .
The reaction of Hydrogen and oxygen:
H 2 (g) + O 2 (g) -------------------------------------> 2H2O
Answer:
The difference between a molecule and a compound is that a compound is made up of atoms from
✔ different elements
.
A chemical change creates a new
✔ substance
.Explanation:
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Choose the incorrect answer below concerning absolute zero.. . lowest possible temperature. theoretical temperature at which gas molecules have no kinetic energy. is equal to 0°C. is equal to 0 K
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Answer: Option (A) is the correct answer.
Explanation:
When monomers in a chemical reaction combine together then it results in the formation of long chains. This process is known as polymerization.
For example, rubber and plastic are formed by polymerization.
Esterification is defined as a process in which esters are formed when an acid is heated with alcohol.
Saponification is defined as a process in which aqueous alkali is heated with a fat or oil resulting in the formation of a soap.
Fermentation is a process in which bacteria like microorganisms, yeast etc help in the breakdown of a substance into simpler substances.
Thus, we can conclude that polymerization is an organic reaction which produces rubber and plastics.
Answers
1) Since you have to find the final volume you have to solve the equation above for V₂ to get V₂=P₁V₁/P₂
P₁=1atm
V₁=2.00L
P₂=6x10^4atm
when you plug everything in you should get 3.33x10^-5 L
2) You are again trying to find V₂ so use the equation V₂=P₁V₁/P₂
P₁=1.2atm
V₁=15000L
P₂=250atm
when you plug everything in you should get 72L
3) we are trying to find the final volume so use the equation V₂=V₁T₂/T₁
V₁=2.2L
T₁=14.2°C (convert this into 287.2K since most gas law equations require the use of kelvin)
T₂=38.98°C (tern this to 311.98K for the same reason as above)
when you plug everything in you should get 2.39L
I hope this helps. Let me know in the comments if anything if anything is unclear.
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Answer:
It can occur with any of the atoms mentioned
Explanation:
Hydrogen bonds are the most intense type of intermolecular force that occurs between permanent dipoles of molecules, where the positive pole is always hydrogen, and the negative pole can be fluorine(F), oxygen(O) or nitrogen(N), since these elements are quite electronegative.
In other words, these atoms most strongly attract double-bonded electrons and are negatively charged.
An example to consider is hydrogen fluoride (HF) molecules, a polar molecule. In the solid state, its molecules attract, so that the positive (hydrogen) pole of one molecule attracts the negative (fluorine) pole of another.
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Answer:
Label
Explanation:
You need to search if the chemical need a glass or plastic container. Also if the chemical need to be in a clear or dark container that can protect it from light. Also if need to be a certain temperature, for example, if need to be in the fridge or can be at room temperature.
Most important is that you need to label with the name, formula, date, and if you have the number of lot and the expiration date.
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Answer: The percentage by mass of carbon in the given compound is 45.8 %
Explanation:
We are given a chemical compound having chemical formula
To calculate the percentage composition of an element in a compound, we use the equation:
In 1 mole of given compound, 10 moles of carbon atoms are there.
Mass of
Mass of carbon element =
Putting values in above equation, we get:
Hence, percentage of carbon in given compound is 45.8 %.
Add them together.
Put the mass of carbon only over the total mass and multiply the result by 100 to get the percentage.
insoluble because most compounds containing the C2H3O2− ion are insoluble in water
soluble because all Ba+2 compounds are soluble in water
insoluble because no Ba+2 are soluble in water
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Answer:
the answer is soluble because compounds containing the C2H3O2− ion are soluble in water