A.
Select the correct structure that
corresponds to the name.
heptane
B.
CH3(CH2)4CH3

A.Select The Correct Structure Thatcorresponds To The Name.heptaneB.CH3(CH2)4CH3

Answers

Answer 1

Answer:

Only A., the stick structure with no branches and five vertices between the two endpoints.

Explanation:

An alkane is a saturated hydrocarbon compound with no branches- just a series of carbon atoms connected with [tex]{\rm C}-{\rm C}[/tex] single bonds. Heptane is the name for an alkane with [tex]7[/tex] carbon atoms (the prefix "[tex]\verb!hept-![/tex]" means "seven".)

Notice that there are only [tex]6[/tex] carbon atoms in the alkane with the condensed structure formula [tex]{\rm CH_{3}}({\rm CH_{2})_{4}{\rm CH_{3}}[/tex]. The name for that structure would be hexane, not heptane.

In general, the condensed structure formula of an alkane with [tex]n[/tex] carbon atoms ([tex]n > 2[/tex]) is [tex]{\rm CH_{3}}({\rm CH_{2}})_{n-2} {\rm CH_{3}}[/tex]. The correct condensed structure formula for heptane ([tex]n = 7[/tex]) would be [tex]{\rm CH_{3}}({\rm CH_{2}})_{5} {\rm CH_{3}}[/tex].

The structure in choice A is represented as a line-angle formula. As long as no letter is present in the formula, each vertex in the line-angle formula (including the endpoints) represents a carbon atom. Hence, the line-angle formula in choice A would represent a hydrocarbon with [tex]7[/tex] carbon atoms.

A single line denotes a single bond between atoms. All [tex]7[/tex] carbon atoms in this structure are thus joined in a line with [tex]{\rm C}-{\rm C}[/tex] single bonds. Hence, this structure denotes an alkane with [tex]7[/tex] carbon atoms- heptane.


Related Questions

1
2
3
4
5
LO
6
7
B
8
9
10
Which functional group is found in an ester?
O=0
R R
O=0
o
с
/
R
OR'
R- OH
O

Answers

Answer:

second option

O=C-OR

R

Explanation:

ester: A compound most often formed by the condensation of an alcohol and an acid, with elimination of water. It contains the functional group C=O. joined via carbon to another oxygen atom.

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What state of matter is it ?

Answers

Answer:

aqueous

Explanation:

Which has a higher metallic character?

A)Lithium
B)calcium



Please explain your answer

Answers

Answer:

Lithium

Explanation:

lithium because metallic character decreases down the group and lithium comes before in group then calcium

Answer:

(A) Lithium


Explanation:

It is higher in metalic

Chemistry equations are only used in a science lab, we don't use chemistry in everday life situations.

Please select the best answer from the choices provided

OT
OF

Answers

Answer:

False

Explanation:

Chemistry is always around us

Why are prefixes often added to si units

Answers

Answer:

b

Explanation:

b


A sample of argon (Ar) gas has a volume of 7.31 L at a pressure of
735 mm Hg and a temperature of 45 C. Determine the volume in
liters when the temperature changes to 55 C and the pressure
changes to 325 mm Hg.

Answers

Answer:

17.1 L

Explanation:

P1V1/T1  =  P2V2/T2        T is in K

P1V1/T1 * T2/P2 = V2

735 * 7.31 / (45+273.15)  * (55+ 273.15)/325 = V2

V2 = 17.1 L

5
Select the correct answer.
In the Arrhenius equation, which variable represents the activation energy for the reaction?
A. Ea
B. R
C.T
D.k

Answers

Answer:

A. Ea, activation energy,, hope this helps.

19. What is Beryllium's spin ?

Answers

Answer:

Nuclear properties

Naturally occurring beryllium, save for slight contamination by the cosmogenic radioisotopes, is isotopically pure beryllium-9, which has a nuclear spin of 3/2.Beryllium is alloyed with copper or nickel to make springs, gyroscopes, electrical contacts, spot-welding electrodes and non-sparking tools, according to the Royal Society of Chemistry. Other beryllium alloys are used in high-speed aircrafts and missiles, as well as spacecraft and communication satellites.

Explanation:

hope this helps if not let me know

PLEASE HELP ASAPP!!!!! PLEASE I’LL TRY TO GIVE BRAINLIEST!

What is a benefit of fossil fuel consumption?

low pollution


increased greenhouse gases


renewable resource


cheap energy

Answers

Answer:

Cheap energy

Explanation:

Fossil fuels such as coal, oil, and gas are widely available and are much cheaper than other forms of energy (wind, nuclear, etc.) Fossil fuel products are also quite efficient, as the efficieny of fossil fuels is about 50% (which is actually really good), while solar panels for example are only about 15% efficient.

How many moles of NaCl are in 5.0 L of a 0.200 M solution?

Answers

Answer:

0.1 moles

Explanation:

moles=5.0×0.200

How many moles are in 0.50 g sodium bromide

Answers

Use stoichometry to calculate this. In order to calculate this answer, you need to divide the grams by the molar mass of sodium bromide. The molar mass of sodium bromide is approximately 103 g/mol. 0.50/103 equates to about 0.00485 moles of sodium bromide.

Heat from a fire place is transferred out to the room it How does the heat from the fire place transfer out to the room?

Answers

Fire burning is a combustion reaction, which is a type of reaction that is always EXOthermic (meaning it gives off heat). When the carbon in the wood reacts with the oxygen in the air, it forms CO2 and H2O, releasing heat in the process that escapes the fire place and transfers out to the room.

As for the spread of heat:

“A fire can spread by radiation when the heat travels through electromagnetic waves in the air”
-FireSealsDirect

Which of the following results when hydrogen and chlorine chemically bond to form hydrogen chloride?
A.
a solution
B.
a mixture
C.
a precipitate
D.
a compound

Answers

Answer:

Hydrogen chloride is a mixture of hydrogen and chlorine elements. The chemical abbreviation of hydrochloric acid is HCl.

Explanation:

The proposed mechanism for a reaction is:
Step 1: A+B= X(fast)
Step 2: X+C - Y(slow)
Step 3: Y - D (fast)
Which rate law is consistent with this mechanism?
-
O A.
rate = k[A][B]
ОВ.
rate = K[X][C]
O C.
rate = k[A][B][C]
OD.
rate = k[X][Y]
=

Answers

Answer:

rate = k[X][C]

Explanation:

When you are solving for rate law, you are only looking at the reactants of the slow reaction. In this case, step 2 is the slow one. Since there is only one X and one C on the reactants side, the coefficient in the rate law would each be one, which you don't need to include, as it is assumed.

Which of the following is the most likely impact of clearing natural landscape to construct high-rise buildings?

Decrease in pollution
Scarcity of drinking water
Increase in animal population
Abundance of non-native plants

Answers

Answer:

the abundance of non-native plants. this MAY be right.

Explanation:

i thought it would be an increase in pollution.

Calculate the volume of 450g of gold (density=19.3 g/cm^3)

Answers

use dimensional analysis and set up your equation like so:

[tex]450g\ x\ \frac{cm^3}{19.3g}[/tex]

if you do the calculations, the 'g' should cancel out which leaves you with the unit 'cm³'

[tex]cm^3=\frac{450g}{19.3g}[/tex]

[tex]cm^3=23.31606218...[/tex]

= 23.3 cm³

[tex]\text{Density,}~ \\\\~~~~~~~\rho = \dfrac{m}{V}\\\\\implies V = \dfrac{m}{\rho}\\\\~~~~~~~~~~=\dfrac{450 ~g}{19.3 ~ g~cm^{-3}}\\\\~~~~~~~~~~=23.3~ cm^3\\\\\text{Hence, the volume of 450g gold is }~23.3 ~cm^3.[/tex]

According to one acid base theory the water acts as ?

Answers

Answer By observing both concepts, water is acting as a base

Running the reaction at 60 C would cause the reaction to...
a. Run SLOWER than normal.
b. Run FASTER than normal.

Answers

Answer:

b. Run FASTER than normal.

Explanation:

Standard temperature is 273 K or 0°C.

Hence, running the reaction at 60°C, which is higher than normal, would cause the reaction to run faster than normal.

What does the word transfer mean?

A. To move from one place to another

B. To block energy flow

C. To move for a new job

D. To move to a warmer place

Group of answer choices

Answers

Answer: i think its A.

Explanation: hope it helps :>

PLEASE HELP!! 30 PTS


Identify the combination reaction.


1.) 2H 2 + O 2 ⟶ 2H 2O

2.) Cl 2 + 2KBr ⟶ 2KCl + Br 2

3.) Al 2S 3 ⟶ 2Al + 3S

4.) C 4H 12 + 7O 2 ⟶ 6H 2O + 4CO 2

Answers

Answer:

1.) 2H2 + O2=2H2O

2.)Cl2 + 2KBr= 2KCl + Br2

4.)C4H12 + 7O2= 6H2O + 4 CO2

A 30:70 (mole %) ratio of acetone:water is heated to 54.36 ∘C at 760 mmHg. What is the total vapor pressure of the system? The vapor pressures for acetone and water at 54.36 ∘C are 712 mmHg and 154 mmHg respectively.

Answers

Answer:

numbers

Explanation:

idek im just bored

When did Stone become interested in caving?
As a child
In high school
During college
After he was 30 years old

Answers

Answer:

William Stone (American Caver) became interested in caving in High school .

You are on a camping trip with your family. While you’re toasting marshmallows, one catches on fire.
List three more items that you might have on a camping trip that would burn.
List three items that wouldn’t burn.

Answers

1. wood
2. plastic cup
3. shoe

1. metal can
2. metal skewer
3. chicken bone
wood
plastic cup
chicken bone

What mass of Al2O3 is formed in the reaction of 4700 kg of aluminum?
Answer in units of kg

Answers

Answer:

2350kg of Al₂O₃

Explanation:

Step 1 : Write the balanced chemical equation:

4Al + 3O₂ → 2Al₂O₃

Step 2: Find the Ratio of Al : Al₂O₃

Al : Al₂O₃

4 :  2

2 : 1

4700: 2350

= 2350kg of Al₂O₃

What is the change in temperature of 150 grams of water when gains 500 Joules of energy?. The Cp for
water is 4.18 J/gxC

Answers

The change in temperature of 150 grams of water when gains 500 Joules of energy is 0.797 °C

What is Heat Transfer ?

Heat transfer is defined as the process in which the molecules are moved from the region of higher temperature to lower temperature.

The heat transfer can be calculated by the formula

[tex]Q=m \times c \times \Delta T[/tex]

Here, Q is the heat supplied to the system,

m is the mass of the system,

c is the specific heat capacity of the system and

Δ T is the change in temperature of the system.

Substituting the values in the equation

m = 150g

Q=500 Joules

[tex]\rm c_{p}[/tex] = 4.18 J/gxC

500 = 150 * 4.18* Δ T

Δ T = 0.797 °C

Therefore the change in temperature of 150 grams of water when gains 500 Joules of energy is 0.797 °C .

To know more about Heat Transfer

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In which state do molecules have the highest kinetic energy? A. in the liquid state B. in the solid state

Answers

Answer: A. In the liquid state

Detailed Explanation:

In liquids, the intermolecular space is more when compared to solids hence the molecules possess more kinetic energy.

which of the following provide evidence of plate motion?

A. shapes of the continents

B. fossil s of the same species found on multiple continents

C. the age distribution of basalt at mid ocean ridges

D. the size of the continents ​

Answers

Answer:

The following evidences of plate motion are:

offset of rocks along the San Andres fault.

the age distribution of basalt at mid-ocean ridges.

the age distribution of the Hawaiian Islands

Which you would expect to diffuse faster, A or B?
A a gas through another gas

B a liquid through another liquid


b) explain you answer

help pls!

Answers

Answer:

A

Explanation:

I would expect a gas to diffuse through another gas faster because gases generally diffuse much faster than liquids. Hence, A is the best option.

How much heat is released when 60.0 G of steam at 235°C is converted to water at 100°C?

Answers

Answer:12668 J.

Explanation:

First of all, steam is there so in order to convert it into water it must have to release latent heat of vaporization which is equal to approximately 2450 kJ/kg or 2450 J/g.

So, the calculation is given below.

Heat released during conversion of steam at 100°C to water at 100°C= m*L

= 5*2450= 12250 J.

Heat released during conversion of water at 100°C to water at 80°C= m*Cp*(∆T)

= 5*4.18*20= 418 J.

So total heat released= 12668 J.

hope this helps:)!!!

The heat energy released or absorbed by a system can be calculated using calorimetric equation. The heat is released when 60.0 g of steam at 235°C is converted to water at 100°C is 33858 J or 338 KJ.

What is calorimetry?

Calorimetry is an analytical tool used to determine the heat energy q absorbed or released in a reaction system. The calorimetric equation connecting mass of the reactant m, specific heat capacity c and temperature difference ΔT is related by the expression:

q = mcΔT.

The mass of steam is given 60 g and temperature difference is from 235 to 100 °C thus 135 °C and the specific heat capacity of  water or steam is 4.18 J/°C. The heat energy released is calculated as follows:

q = 60 g × 4.18 J/°C × 135 °C

  = 33858 J

Hence, heat is released when 60.0 g of steam at 235°C is converted to water at 100°C is 33585 J.

To refer more on calorimetry, refer the link:

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Nitroglycerine (C3H5(NO3)) is a powerful explosive. The products of this reaction are
elemental oxygen, elemental nitrogen, water, and carbon dioxide. The Gibbs free energy for this
reaction is negative at 273 K. Determine whether the reaction is spontaneous.

Answers

The Gibbs free energy describes the spontaneity of the chemical reaction. The reaction involving nitroglycerine is spontaneous.

What is spontaneity?

Spontaneity is the condition of the reaction that continuously makes the product without adding input energy again and again. It is determined by the Gibbs free energy of the system.

When the Gibbs free energy of the thermodynamic system is negative then the reaction is said to be exothermic and is a spontaneous reaction. The negative Gibbs free energy of nitroglycerine at 273 K shows spontaneity.

Therefore, the reaction is spontaneous.

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