Which formula represents a hydrocarbon?(1) CH3CH2CH2CHO
(2) CH3CH2CH2CH3
(3) CH3CH2CH2COOH
(4) CH3CH2COOCH3

Answers

Answer 1

Answer: 2 because it is the only one that contains Carbon and Hydrogen only

Answer 2

Answer:

$CH_(3)CH_(2)CH_(2)CH_(3)$ formula represents a hydrocarbon. Therefore, option (2) is correct.

Hydrocarbons are merely carbon and hydrogen. Aliphatic or aromatic. Aliphatic hydrocarbons are saturated or unsaturated open-chain hydrocarbons.Saturated aliphatic hydrocarbons have single bonds, while unsaturated ones have double or triple bonds.

Aromatic hydrocarbons have alternating double bonds in a ring.Only option 2— $CH_(3)CH_(2)CH_(2)CH_(3)$ —is a hydrocarbon. Butane, a saturated aliphatic hydrocarbon, with four carbon and 10 hydrogen atoms.

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Related Questions

H2(g) + CO2(g) + 10 kcal H2O(g) + CO(g)In another experiment involving the above reaction at 1,000°C, the equilibrium concentrations were found to be: H2(g) = 2.0 moles per liter H2O(g) = 4.0 moles per liter CO2(g) = 5.0 moles per liter CO(g) = 4.0 moles per liter What is the equilibrium constant, Keq, for this reaction?
To calculate the amount of heat absorbed as a substance melts, which of the following information is NOT needed?a.the mass of the substancec.the change in temperatureb.the specific heat of the substanced.the density of the sample
Select the non-metals. N Br Ca Na Fe
What volume of oxygen at STP is required for the complete combustion of 100.50 mL of C2H2?
Molding a shape from soft, malleable material (clay or plaster) or constructing a shape from harder material (such as metal or paper). Molding is what a child does with Play-Doh or origami.

How does the reaction affect oxygen atoms?

Answers

In the oxygen structure, all electrons are paired, thus, making oxygen dimagnetic. But actual experiments have shown that oxygen has paramagnetic properties. They are attracted to magnets.

The oxygen atoms react according to the kind of reaction it undergoes. Mostly, O2 is present in combustion reactions. For example, combustion of carbon:

C + O2 ---> CO2

How can a scientist assess whether a pure niobium (Nb) sample is responsible for contaminating the lab with radioactivity? Test the niobium sample to see whether it now contains other elements.
Test the niobium sample for the presence of niobium oxide compounds.
Heat the niobium, and see if the level of radioactivity in the lab increases.
Place the niobium under pressure, and see if the level of radioactivity in the lab increases.

Answers

Test the niobium sample to see whether it now contains other elements.
The 2nd choice doesn't work because niobium oxides aren't radioactive (unless the niobium itself was radioactive, but you can't tell with this method).
The last 2 choices don't work because temperature and pressure don't affect the rate of decay.

A scientist can assess whether a pure niobium (Nb) sample is responsible for contaminating the lab with radioactivity by A. Testing the niobium sample to see whether it now contains other elements.

What is radioactivity?

It should be noted that radioactivity simply means the natural process through which atoms disintegrate.

In this case, the scientist can assess whether a pure niobium (Nb) sample is responsible for contaminating the lab with radioactivity by testing the niobium sample to see whether it now contains other elements.

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I have an unknown volume of gas at a pressure of 0.5 atm and a temperature of 325k if I raise the pressure to 1.2 atm, decrease the temperature to 320k, and measures the final volume to be 48 liters what was the initial volume of the gas?

Answers

The initial volume of the gas is 117L.

What is volume?

Volume is the amount of space the matter occupies.

What do you mean by combined gas law?

The combined gas law combines the three gas laws: Boyle's Law, Charles' Law, and Gay-Lussac's Law.
It states that the ratio of the product of pressure and volume and the absolute temperature of a gas is equal to a constant.
When Avogadro's law is added to the combined gas law, the ideal gas law results.
It is a combination of the other gas laws that works when everything except temperature, pressure, and volume are kept constant.
There are a couple of common equations for writing the combined gas law. The classic law relates Boyle's law and Charles' law to state:

PV/T = k

where P = pressure, V = volume, T = absolute temperature in K and k= constant.

Another common formula for the combined gas law relates before and after conditions of a gas:

P1V1 / T1 = P2V2 / T2

Where P1 and P2 = initial and final pressure in atm

T1 and T2 = Initial and final temperature in K

V1 and V2 = initial and final volume in L

Using combined gas law:

P1V1/T1 = P2V2/T2

Given:

P1 = 0.5 atm

T1 = 325K

P2 = 1.2 atm

V2 = 48L

T2 = 320K

Assuming that the number of moles are constant for both conditions:

(P1 x V1)/T1 = (P2 x V2)/T2

Substituting the given values,

(0.5 x V1)/325 = (1.2 x 48)/320K

Solving for V1

V1 = (1.2atm x 48L x 325K)/ (320Kx 0.5 atm)

V1 = 117L

Hence, the initial volume of the gas is 117L.

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Use the Equation of Clapeyron:

$(P_1.V_1)/(T_1)=(P_2.V_2)/(T_2)\n \n (0.5V_1)/(235)=(1.2*48)/(320)\n \n 320*0.5V_1=235*1.2*48\n \n V_1=(235*1.2*48)/(320*0.5)=84.5 liters$

Could a prokaryote have tissue , organs , and organ system ?

Answers

Prokaryotes are usually unicellular - and so would not have tissue, organs or organ systems.Some prokaryotes are multicellular, and you could potentially say that they are a tissue (many similar cells working together to perform a task). However, no prokaryotes have organs or organ systems.

no they are usually uni-cellular

Prehistory can be described as _____.what happened last year
what happened millions of years ago
the time prior to the use of written records

Answers

The way we usually think of history is the time of written records; or similar records(auditory, video) when we have direct evidence of what happened as opposed to reconstructing it from archaeological evidence. Pre-history is the time before this: the time prior to the use of written records

Which element is so active chemically that it occurs naturally only in compounds?1. Potassium
2. Silver
3. Copper
4. Sulfur

Answers

1) POTASSIUM is an element that is chemically active that it occurs naturally only in compounds.

Potassium is one of the alkali metals; alkali metals are the most active metals.
Potassium is so active that it never occurs free in nature. It always occurs in compounds, combined with other elements.

95% of potassium is used as fertilizers, the remaining 5% is divided into creating potassium hydroxide, potassium chloride solution, and potassium carbonate.

Potassium hydroxide is used to make soaps and detergents.
Potassium chloride is used in pharmaceuticals, medical drips, and saline injections.
Potassium carbonate is used in glass manufacturing; particularly, glass used in television sets.
Other potassium salts are used in making iodized salts, used in baking, tanning leather, and photography.

Final answer:

Potassium is the element that is so active chemically that it occurs naturally only in compounds.

Explanation:

The element that is so active chemically that it occurs naturally only in compounds is potassium.

Potassium is a highly reactive alkali metal that is commonly found in nature bonded to other elements in compounds. It is not found in its pure form due to its reactivity.

An example of a compound that contains potassium is potassium chloride (KCl), which is commonly used as a salt substitute.