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4 years ago

When the alkene below is brominated with NBS reaction can occur at more than one carbon.

Chemistry

1 answer:

katrin2010 [14]4 years ago

7 0

Answer:

Four products are possible.(in attachment)

2,3,4,5 carbons attached to the bromine.

Explanation:

NBS is N-bromosuccinamide which is used to brominate the allylic and benzylic positions of the compound.

Mainly used for the allylic bromination Here, four products are possible among them two are formed by the direct allylic bromination and remaining two products are formed by the rearrangement of the radical formation.

2,3,4,5 carbons of the compound are attached to the bromine.

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in the following balanced equation 2C2H6 + 7O2 --> 4CO2 + 6H20 if 7.0 g of C2H6 react with 18g of O2, how many grams of water

lesya692 [45]

<u>Answer:</u> Amount of water produced is 8.6778 grams.

<u>Explanation:</u>

To calculate the amount of water produced, we first need to find the limiting reagent and for it we need to find the number of moles. To calculate the moles, we use the following equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ...(1)

Moles of $C_2H_6$ :

Given mass of $C_2H_6$ = 7 grams

Molar mass of $C_2H_6$ = 30 g/mol

Putting values in above equation, we get:

$\text{Number of moles}=\frac{7g}{30g/mol}=0.2333moles$

Moles of $O_2$ :

Given mass of $O_2$ = 18 grams

Molar mass of $O_2$ = 32 g/mol

Putting values in above equation, we get:

$\text{Number of moles}=\frac{18g}{32g/mol}=0.5625moles$

For the given chemical reaction, the equation follows:

$2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O$

By Stoichiometry:

7 moles of oxygen reacts with 2 moles of ethane.

So, 0.0261 moles of lead nitrate are produced by = $\frac{2}{7}\times 0.5625=0.1607moles$ of ethane.

As, the required amount of ethane is less than the given amount. Hence, it is considered as the excess reagent.

Oxygen gas is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

7 moles of oxygen gas produces 6 moles of water.

So, 0.5625 moles of oxygen gas will produce = $\frac{6}{7}\times 0.5625=0.4821moles$ of water.

Now, to calculate the mass of water produced, we use equation 1.

Molar mass of water = 18 g/mol

Moles of water produced = 0.4821 moles

Putting values in the equation, we get:

$0.4821mol=\frac{\text{Mass of water}}{18g/mol}$

Mass of water produced = 8.6778 grams.

Hence, amount of water produced is 8.6778 grams.

8 0

4 years ago

Question 9 (1 point)

Mnenie [13.5K]

Answer:I’m not sure

Explanation:free trial

4 0

3 years ago

How do polar and nonpolar covalent bonds differ?

3241004551 [841]

Answer: In polar covalent bonds a pair of electrons are unequally shared between two atoms, while in nonpolar covalent bonds two atoms share a pair of electrons with each other.

I hope this helps :)

Explanation:

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3 years ago

What did ruthorford discover that thomson did not understand

Marianna [84]

Answer: Atoms aren't entirely empty space

Explanation:

Rutherford did his scatter experiment to disprove Thomson's Plum Pudding Model. Rutherford shot helium nuclei at a sheet of gold and expected the particles to all go straight through to a sensor. The reason he expected this was because Thomson said that atoms are mostly made of empty space. Not all the particles went through the gold sheet, a lot of them actually reflected back to him. This meant that atoms aren't entirely empty space and something had to deflect the helium nuclei

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4 years ago

For which of these processes is the value of ΔH expected to be negative?I. The temperature (of water) increases when calcium chl

Marina CMI [18]

Answer: B.) I, II, and III

Explanation:

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and $\Delta H$ for the reaction comes out to be negative.

Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and $\Delta H$ for the reaction comes out to be positive.

I) The temperature (of water) increases when calcium chloride dissolves in water : Thus the reaction is exothermic and $\Delta H$ for the reaction comes out to be negative.

II) Steam condenses to liquid water : The energy is released when bonds are formed when it coverts from gas to liquid and thus $\Delta H$ for the reaction comes out to be negative.

III) Water freezes : The energy is released when bonds are formed to get converted from liquid to solid and thus $\Delta H$ for the reaction comes out to be negative.

IV) Dry ice sublimes : The energy is absorbed when bonds are broken to get converted from solid to gas and thus $\Delta H$ for the reaction comes out to be positive.

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4 years ago