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Maksim231197 [3]
3 years ago
8

Which compounds, on heating with an excess of concentrated sulfuric acid, produce only one product with molecular formula C7H10?

[choices on the picture]

Chemistry
1 answer:
podryga [215]3 years ago
8 0

Answer:

1 and 2

Explanation:

When Concentrated H2SO4 reacted with the alcohols, they produce cycloalkenes. This is a mechanism known as dehydration of alcohols with an acid catalyst. This is because concentrated H2SO4 acts as a great oxidizing agent. In the process, the alcohols are heated to a high temperature with an excess of pure sulfuric acid. By passing the gases through a sodium hydroxide solution, the carbon dioxide and sulfur dioxide produced by reactive species are eliminated. The reaction mechanism shown in the image below indicates that only compounds 1 and 2 produce only one product.

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A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next fe
Agata [3.3K]

Answer:

not goin to be rude but I don't even get the question??

5 0
3 years ago
Calculate the amount in grams of Na2CO3 needed to react with HCL to produce 120g NaCl
worty [1.4K]
Let's start off with the balanced chemical equation:

Na_2CO_{3_{(s)}} + \textbf2HCl_{_{(aq)}}\rightarrow CO_{2_{(g)}} + H_2O_{_{(l)}} + \textbf2NaCl_{_{(aq)}}

Assuming the sodium carbonate is the limiting reagent, look at the coefficients of sodium carbonate and sodium chloride and use those as a ratio of sodium carbonate to sodium chloride: 1:2.

Since you have the required mass of NaCl, convert this to moles.

Assuming you know how to find the molar mass of NaCl:

M_{NaCl} = 58.44g/mol
n = \frac{m}{M}
n_{NaCl} = \frac{120g}{58.44g/mol}
n_{NaCl} = 2.053mol

Using the ratio, since 1 mole of sodium carbonate is required to produce 2 moles of sodium chloride, cross-multiply the ratios:

1:2 = x:2.053mol
2x = 2.053mol
x = 1.027mol

Therefore 1.027 moles of sodium carbonate is required to produce the required amount of sodium chloride. Convert to mass for your final answer:

n_{Na_2CO_3} = 1.027mol
M_{Na_2CO_3} = 105.99g/mol
m = nM
m = (1.027mol)(105.99g/mol)
m_{Na_2CO_3} = 108.85g

Hope this helps :)
6 0
3 years ago
A student carried heated a 25.00 g piece of aluminum to a temperature of 100°C, and placed it in 100.00 g of water, initially at
lawyer [7]

<u>Answer:</u> The final temperature of the system is 14.60°C

<u>Explanation:</u>

When metal is dipped in water, the amount of heat released by metal will be equal to the amount of heat absorbed by water.

Heat_{\text{absorbed}}=Heat_{\text{released}}

The equation used to calculate heat released or absorbed follows:

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

m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]      ......(1)

where,

q = heat absorbed or released

m_1 = mass of aluminium = 25.00 g

m_2 = mass of water = 100 g

T_{final} = final temperature = ?°C

T_1 = initial temperature of aluminium = 100°C

T_2 = initial temperature of water = 10°C

c_1 = specific heat of aluminium = 0.900 J/g°C

c_2 = specific heat of water= 4.18 J/g°C

Putting values in equation 1, we get:

25\times 0.900\times (T_{final}-100)=-[100\times 4.18\times (T_{final}-10)]

T_{final}=14.60^oC

Hence, the final temperature of the system is 14.60°C

3 0
3 years ago
How do you determine the volume of an irregular object if you don't know the density?
Galina-37 [17]

Answer:

You can find the volume of an irregular object by immersing it in water in a beaker or other container with volume markings, and by seeing how much the level goes up.

Explanation:

8 0
4 years ago
Which material has a greater density, lead or feathers?
algol13

Lead has a higher density


5 0
3 years ago
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