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3 years ago

Which molecule contains a total of eight carbon atoms?

2 answers:

8 0

The molecule that contains a total of eight carbon atoms :
b. 2-methyl-heptane

formula of 2-methyl-heptane
C8H18 ( or CH3CH(CH3)CH2(CH2)3CH3 rather )

hope this help

Elanso [62]3 years ago

5 0

Answer:

The correct answer is 2-methyl-heptane

Explanation:

4-methyl-2-octene

In this organic molecule there is a straight chain of 8 carbon atoms along with methyl group on the forth carbon atom.So, total carbon atom in the molecule are 9 carbon atoms.

2-methyl-heptane

In this organic molecule there is a straight chain of 7 carbon atoms along with methyl group on second carbon atom.So, total carbon atom in the molecule are 8 carbon atoms.

3-methyl-nonane

In this organic molecule there is a straight chain of 9 carbon atoms along with methyl group on third carbon atom.So,total carbon atom in the molecule are 10 carbon atoms.

4-propyl-3-heptyne

In this organic molecule there is a straight chain of 7 carbon atoms along with propyl group on forth carbon atom.So, total carbon atom in the molecule are 11 carbon atoms.

You might be interested in

What is the freezing point of a solution that contains 36.0 g of glucose ( ) in 500.0 g of water? ( for water is 1.86°c/m. the m

Marizza181 [45]

Answer: - 1.86°C

Explanation:

The depression of freezing points of solutions is a colligative property.

That means that the depression of freezing points of solutions depends on the number of molecules or particles dissolved and not the nature of the solute.

To solve the problem follow these steps:

Data:

Tf = ?
solute = glucosa (this implies i factor is 1)
mass of solue = 36.0 g
mass of water = 500 g
Kf = 1.86 °/m
mm glucose = 180.0 g / mol

2) Formulas

Tf = Normal Tf - ΔTf

ΔTf = i * kf * m

m = number of moles of solute / kg of solvent

number of moles of solute = mass in grams / molar mass

3) Solution

number of moles of solute = 36.0 g / 180.0 g/mol = 0.2 mol

m = 0.2 mol / 0.5 kg = 1.0 m

ΔTf = i * Kb * m = 1 * 1.86 °C/m * 1 m = 1.86°C

Tf = 0°C - 1.86°C = - 1.86°C

Answer: - 1.86 °C

7 0

3 years ago

I am so lost, and suggestions to how I can solve this?

Ad libitum [116K]

<h3>Answer:</h3>

165.078 g

<h3>Explanation:</h3>

<u>We are given;</u>

Specific heat capacity of nickel as 0.446 J/g°C
Initial temperature of nickel is 255.5 °C
Mass of water in the calorimeter is 250.0 g
Initial temperature of water is 20° C
Final temperature of the mixture is 35.5°C

Specific heat capacity of water is 4.18 J/g°C

We are required to calculate the mass of nickel sample;

<h3>Step 1: Calculate the amount of heat absorbed by water.</h3>

We know that quantity of heat absorbed, Q = m × c × ΔT

Change in temperature, ΔT = 35.5°C - 20°C

= 15.5 °C

Therefore, Q = 250 g × 4.1 J/g°C × 15.5° C

= 16,197.5 Joules

<h3>Step 2: Calculate the amount of heat released by nickel sample</h3>

Assuming the mass of nickel sample is m

Then, Heat released, Q = m × c × ΔT

Change in temperature, ΔT = 255.5 °C - 35.5 ° C

= 220 °C

Q = m × 0.446 J/g°C × 220° C

= 98.12m joules

<h3>Step 3: Determine the mass of nickel sample</h3>

We know that the amount of heat absorbed is equivalent to amount of heat released.

That is, Quantity of heat absorbed = Quantity of heat released

Therefore;

98.12 m joules = 16,197.5 Joules

m = 165.078 g

Thus, the mass of nickel sample is 165.078 g

8 0

4 years ago

Describe the relationship between the number of valence electrons and the chemical properties of atoms. ?!??!??

AURORKA [14]

The valence electrons are determined by the column that the element falls in.

Column 1 has 1 valence electron

Column 2 has 2 valence electrons

Column 13 has 3 valence electrons

Column 15 has 5 valence electrons

column 16 has 6 valence electrons

column 17 has 7 valence electrons

Elements are trying to become stable by filling the outer energy level. Columns 1,2,3 do this by losing 1,2 or 3 electrons and becoming positive ions. +1, +2, +3, respectively

Columns 15, 16, 17 do this by taking those electrons and becoming negative ions. -3, -2, -3. respectively.

8 0

3 years ago

6kg of coal (carbon) is burned in air. What mass of carbon dioxide will be produced? (Assume that combustion is complete and ign

Flauer [41]

The mass of carbon dioxide that would be produced will be 22 kg

<h3>Combustion of carbon</h3>

The combustion of carbon in air can be represented by the equation:

C + O2 ---> CO2

The mole ratio of C to O2 to CO2 is 1:1:1.

Mole of 6kg of carbon = mass/molar mass

= 6000/12

= 500 moles

Equivalent mole of CO2 produced = 500 moles

Mass of 500 moles CO2 = mole x molar mass

= 500 x 44.01

= 22,005 g or 22 kg approximately

More on combustion reactions can be found here: brainly.com/question/13649083

6 0

3 years ago

When there are 0.0814 moles of hockey pucks how many hockey pucks are there?

Dovator [93]

Answer:

4.9 x 10²²hockey pucks

Explanation:

Given parameters:

Number of moles of hockey = 0.0814moles

Unknown:

Number of pucks there = ?

Solution:

A mole of a substance is made up of Avogadro's number of particles.

Therefore;

1 mole of hockey pucks will contain 6.02 x 10²³ hockey pucks

0.0814 mole of hockey pucks will contain :

0.0814 x 6.02 x 10²³ = 4.9 x 10²²hockey pucks

8 0

3 years ago