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blsea [12.9K]
3 years ago
7

Which best describes the functional group in an aldehyde?

Chemistry
2 answers:
Minchanka [31]3 years ago
6 0

Answer : The correct option is, (C) a carbon chain with a carbonyl group bonded to one end.

Explanation :

An aldehyde is an organic compound which contain a functional group with (-CHO) i.e R-CHO

R-CHO functional group consists of a carbonyl center that means a carbon which is double-bonded to the oxygen. The carbon of this carbonyl group bonded with the hydrogen to one end and a carbon chain, (R) to another end.

Some examples of an aldehydes are formaldehyde (HCHO), acetaldehyde (CH_3CHO)

Therefore, the correct answer is, (C)

aniked [119]3 years ago
3 0
<span>C. a carbon chain with a carbonyl group bonded to one end 

</span>
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When 125 mL of 0.150 M Pb(NO3)2 is mixed with 145 mL of 0.200 M KBr, 4.92 g of PbBr2 is collected. Calculate the percent yield.
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Y = 92.5 %

Explanation:

Hello there!

In this case, since the reaction between lead (II) nitrate and potassium bromide is:

Pb(NO_3)_2+2KBr\rightarrow PbBr_2+2KNO_3

Exhibits a 1:2 mole ratio of the former to the later, we can calculate the moles of lead (II) bromide product to figure out the limiting reactant:

0.125L*0.150\frac{molPb(NO_3)_2}{L} *\frac{1molPbBr_2}{1molPb(NO_3)_2} =0.01875molPbBr_2\\\\0.145L*0.200\frac{molKBr}{L} *\frac{1molPbBr_2}{2molKBr} =0.0145molPbBr_2

Thus, the limiting reactant is the KBr as it yields the fewest moles of PbBr2 product. Afterwards, we calculate the mass of product by using its molar mass:

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Y=\frac{4.92g}{5.32g} *100\%\\\\Y=92.5\%

Regards!

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