Answer:
The answer to your question is 9.034 x 10²³ molecules
Explanation:
Data
number of molecules = ?
number of moles = 1.50
Process
To solve this problem, use Avogadro's number. This number relates 1 mol of a substance to 6.023 x 10²³ molecules.
1 mol of CO₂ --------------- 6.023 x 10 ²³ molecules
1.5 moles of CO₂ ---------- x
x = (1.5 x 6.023 x 10²³) / 1
x = 9.034 x 10²³ molecules
Answer:
Six
Explanation:
Mᵣ = 46
Aᵣ(C) = 0.522 × 46 = 24
Difference = 22
Less 1 O = -16
Aᵣ(H) = 6
The relative atomic mass of the H atoms is 6.
The molecule contains six hydrogen atoms.
b. liquids.
c. malleable.
d. gases.
Answer : At room temperature, none of the metals are gases.
Explanation :
The properties of metals are :
Generally all the metals are solid at room temperature but with exception, the mercury is liquid at room temperature.
Generally all the metals are hard but with the exception, sodium and potassium are soft and easily cut with the knife.
The metals are malleable, ductile, lustrous in nature.
Metals are good conductor or heat and electricity.
Hence, At room temperature, none of the metals are gases.
Answer: Option (d) is the correct answer.
Explanation:
It is known that most of the metals are solid at room temperature but with a few exceptions like mercury is a liquid at room temperature and sodium is a soft metal as it can be cut with a knife.
Also, metals are malleable in nature that is, they can be shaped into thin sheets.
But metals are never gases. Hence, we can conclude that at room temperature, none of the metals are gases.
Radical chlorination of pentane and neopentane results in different yields of the desired products due to the selectivity of the reaction. With neopentane, the reaction is very selective, producing a higher yield of neopentyl chloride, while with pentane, the reaction isn't selective, leading to various isomers and a lower yield of 1-chloropentane.
Radical chlorination of pentane isn't an efficient method to prepare 1-chloropentane because it doesn't give a high yield of the desired product. This is due to it being a non-selective process, leading to the formation of several isomeric products. In the case of pentane, several different hydrogens can be replaced creating many possible isomers of chloropentane.
On the other hand, radical chlorination of neopentane or (CH3)4C is a good way to prepare neopentyl chloride or (CH3)3CCH2Cl. This is because neopentane has a far greater proportion of equivalent tertiary hydrogens. When chlorination occurs, it's most likely to happen at these sites, producing a higher yield of the desired neopentyl chloride product with less chance of isomer formation.
This difference is due to the selectivity and specificity of the radical chlorination reaction on neopentane versus pentane. Radical chlorination is not very selective with pentane but is quite selective with neopentane due to the type of hydrogens present, thus making it a more ideal reaction.
#SPJ11
c. cutting
b. milling
d. welding
Answer:
d. welding is the correct answer.
Explanation:
The half life of sodium -24 is 15 hour.
The duration needed for an amount to decrease to half its original is known as the half-life.
Sodium is a kind of element which has atomic number 11. It has three isotopes.
The radioactive isotope sodium-24, which is employed in blood tests in medicine, degrades through beta decay as well as seems to have an of 15.0 hours.
Therefore, the half life of sodium -24 is 15 hour.
To know more about half life.
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number of protons
number of neutrons
number of valence electrons