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OLEGan [10]
3 years ago
8

Which hydrocarbon name adheres correctly to the IUPAC naming system? 3–ethyl–2,4–dimethylhexane 3–methethyl–2,dimethylhexane 4–d

imethylhexane–3–ethyl 4–dimenthylhexane, 3–ethyl
Chemistry
1 answer:
faltersainse [42]3 years ago
4 0
3–ethyl–2,4–dimethylhexane

CH₃-CH(CH₃)-CH(C₂H₅)-CH(CH₃)-CH₂-CH₃
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A sample of aluminum, which has a specific heat capacity of 0.897·J·g−1°C^−1 , is put into a calorimeter (see sketch at right) t
Tcecarenko [31]

Answer: The mass of aluminium sample is 55.4 gram

Explanation:

Q_{absorbed}=Q_{released}

As we know that,  

Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})

m_1\times c\times (T_{final}-T_1)=-[m_2\times c\times (T_{final}-T_2)]      

where,

m_1 = mass of aluminium = ?

m_2 = mass of water = 300.0 g

T_{final} = final temperature = 23.8^0C

T_1 = temperature of aluminium = 94.5^oC

T_2 = temperature of water = 21.0^oC

c_1 = specific heat of aluminium = 0.897J/g^0C

c_2 = specific heat of water =  4.184J/g^0C

Now put all the given values in equation (1), we get

-[m_1\times c_1\times (T_{final}-T_1)]=[m_2\times c_2\times (T_{final}-T_2)]

-[m_1\times 0.897\times (23.8-94.5)^0C]=[300.0g\times 4.184\times (23.8-21.0)]

m_1=55.4g

Therefore, the mass of aluminium sample is 55.4 gram

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3 years ago
The R group or side chain of the amino acid leucine is non-polar. The R group of serine is polar. Where would you expect to find
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Answer:

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the 4 by the element symbol O multiplied by the 3 on the outside of the parentheses

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Neutral charges and are found in the center? I'm not sure for the last answer
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