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3 years ago

Which of the following molecules would have the strongest London Dispersion Force?

Chemistry

1 answer:

weeeeeb [17]3 years ago

7 0

Answer: D

Explanation:

London forces become stronger as the atom in question becomes larger, and to a smaller degree for large molecules. [4] This is due to the increased polarizability of molecules with larger, more dispersed electron clouds. The polarizability is a measure of ease with which electrons can be redistributed; a large polarizability implies that the electrons are more easily redistributed. This trend is exemplified by the halogens (from smallest to largest: F 2 , Cl2 , Br 2 , I 2 ). The same increase of dispersive attraction occurs within and between organic molecules in the order RF<RCL<RBr<RI, or with other more polarizable heteroatoms. [5] Fluorine and chlorine are

gases at room temperature, bromine is a liquid, and iodine is a solid. The London forces are thought to be arise from the motion of electrons.

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If there are 40 mol of NBr3 and 48 mol of NaOH, what is the excess reactant?

Nata [24]

Answer:

The correct answer is option B.

Explanation:

$3NaOH+2NBr_3\rightarrow 3HOBr+3NaBr+N_2$

Moles of $NBr_3$ = 40 mol

Moles of NaOH = 48 mol

According to reaction, 3 moles of NaOH reacts with 2 moles $NBr_3$

Then ,48 moles of NaOH will reacts with:

$\frac{2}{3}\times 48 mol=32 mol$ of $NBr_3$

Then ,40 moles of $NaBr_3$ will reacts with:

$\frac{3}{2}\times 40 mol=60 mol$ of NaOH

As we can see that 48 moles of sodium will completey react with 32 moles of nitrogen tribromide.

Moles left after reaction = 40 mol - 32 mol = 8 mol

Hence, the $NBr_3$ is an excessive reagent.

6 0

2 years ago

Read 2 more answers

How much heat is required to change the temperature of a 15 g aluminum can with 100 g of water from 24.5°C to 55°C?

Assoli18 [71]

Heat capacity of aluminium = 0.900 J/g°C
While heat capacity of water = 4.186 J/g°C
Heat = heat gained by water + heat gained by aluminium
Heat gained by water = 100 × 4.186 × 30.5
= 12767.3 Joules
Heat gained by aluminium = 15 × 0.9 × 30.5
= 411.75 Joules
Heat required = 13179.05 Joules or 13.179 kJoules

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2 years ago

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n200080 [17]

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2 years ago

Select all that apply. According to scientists, the distribution of volcanoes throughout the world… Is fairly even and widesprea

Ipatiy [6.2K]

Only answers C and D would make sense in this question. Hope I helped please give brainiest!

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2 years ago

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Calculate the rcf (recipe conversion factor) for a new yield of 80 oz. (5 lbs) blueberry muffin batter. the original yield of th

SCORPION-xisa [38]

The rcf (recipe conversion factor)= 0.6

<h3>What is the rcf (recipe conversion factor)?</h3>

The conversion factor approach is the most typical technique for modifying recipes.
Finding a conversion factor and multiplying the ingredients in the original recipe by that factor are the only two steps needed to do this.
Remember that the conversion factor will be larger than 1 if you are raising your amounts to be sure you are finding it correctly.
The factor will be less than 1 if your amounts are being decreased. Use the conversion factor approach if you come across a recipe that is written in a standard format.

The production of phenolic monomers from lignin is effective and selective when done using reductive catalytic fractionation (RCF).

How this is calculated?

Conversion Factor = New Yield ÷ Old Yield

=80/134

=0.5970

=0.6(rounded to nearest tenth)

To know more about the recipe conversion factor (RCF),refer:

brainly.com/question/23841906

#SPJ4

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1 year ago