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3 years ago

How do humans increase eutrophication?

1 answer:

4 0

Human activities can contribute excess amounts of nitrogen and phosphorus into water. Therefore,human causes of eutrophicationinclude the use of agricultural fertilizers. Other causes include sewage and aquaculture, which is the growing or farming of fish, shellfish and aquatic plants.

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Given the balanced equation 2C4H10 + 13O2 → 8CO2 + 10H2O, how many moles of CO2 are produced when 14.9g of O2 are used?

Anna [14]

Answer: The number of moles of $CO_2$ produced are, 0.287 moles.

Explanation : Given,

Mass of $O_2$ = 14.9 g

Molar mass of $O_2$ = 32 g/mol

First we have to calculate the moles of $O_2$

$\text{Moles of }O_2=\frac{\text{Given mass }O_2}{\text{Molar mass }O_2}$

$\text{Moles of }O_2=\frac{14.9g}{32g/mol}=0.466mol$

Now we have to calculate the moles of $CO_2$

The balanced chemical equation is:

$2C_4H_{10}+13O_2\rightarrow 10H_2O+8CO_2$

From the reaction, we conclude that

As, 13 mole of $O_2$ react to give 8 moles of $CO_2$

So, 0.466 mole of $O_2$ react to give $\frac{8}{13}\times 0.466=0.287$ mole of $CO_2$

Therefore, the number of moles of $CO_2$ produced are, 0.287 moles.

3 0

3 years ago

Blank occurs when water molecules at the surface of a pool have enough kinetic energy that the attractive forces holding them to

Hunter-Best [27]

Evaporation occurs when water molecules at the surface of a pool have enough kinetic energy that the attractive forces holding them to the liquid can be overcome

6 0

3 years ago

Nonmetals are excellent conductors of heat and electricity.<br> a. True<br> b. False

weeeeeb [17]

It's False.
Only metals can be conductors of heat and electricity.

4 0

4 years ago

In the coal-gasification process, carbon monoxide is converted to carbon dioxide via the following reaction: CO (g) + H2O (g) ⇌

Oksana_A [137]

Answer: Equilibrium constant is 0.70.

Explanation:

Initial moles of $CO$ = 0.35 mole

Volume of container = 1 L

Initial concentration of $CO=\frac{moles}{volume}=\frac{0.35moles}{1L}=0.35M$

Initial moles of $H_2O$ = 0.40 mole

Volume of container = 1 L

Initial concentration of $H_2O=\frac{moles}{volume}=\frac{0.40moles}{1L}=0.40M$

equilibrium concentration of $CO=\frac{moles}{volume}=\frac{0.18moles}{1L}=0.18M$ [/tex]

The given balanced equilibrium reaction is,

$CO(g)+H_2O(g)\rightleftharpoons CO_2(g)+H_2(g)$

Initial conc. 0.35 M 0.40M 0 0

At eqm. conc. (0.35-x) M (0.40-x) M (x) M (x) M

The expression for equilibrium constant for this reaction will be,

$K_c=\frac{[CO_2]\times [H_2O]}{[CO]\times [H_2O]}$

$K_c=\frac{x\times x}{(0.40-x)(0.35-x)}$

we are given : (0.35-x)= 0.18

x = 0.17

Now put all the given values in this expression, we get :

$K_c=\frac{0.17\times 0.17}{(0.40-0.17)(0.35-0.17)}$

$K_c=0.70$

Thus the value of the equilibrium constant is 0.70.

5 0

3 years ago

Indicate which reaction will occur faster. Explain your reasoning. Select the single best answer. Hexyl chloride or cyclohexyl c

Maslowich

The question is incomplete, the complete question is;

Indicate which reaction will occur faster. Explain your reasoning. Select the single best answer Hexyl chloride or cyclohexyl chloride with sodium azide in aqueous ethanol O Cyclohexyl chloride reacts faster because it is more soluble in the solvent OHexyl chloride reacts faster because it is less sterically hindered. O Cyclohexyl chloride reacts faster because its carbocation intermediate is more stable. Hexyl chloride reacts faster because hydrogen abstraction is more likely to occur in this compound.

Answer:

Hexyl chloride reacts faster because it is less sterically hindered.

Explanation:

Now we have to think through the problem carefully. We must remember that the azide ion is a good nucleophile. Being a good nucleophile, we should be thinking about an SN2 reaction mechanism.

Though ethanol is a polar protic solvent which may weaken the nucleophile by hydrogen bonding, the nucleophile will still react very fast with a primary alkyl halide such as hexyl chloride via SN2 mechanism.

The substrate is easily accessible to the azide ion in hexyl chloride compared to cyclohexyl chloride hence hexyl chloride reacts faster than cyclohexyl chloride.

4 0

3 years ago