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4 years ago

Which of the following is not a mixture?

Chemistry

1 answer:

AnnZ [28]4 years ago

6 0

Answer:

A mixture is a substance you can separate. Either in a lab or by hand. What are mixtures are like trail mix or homogeneous mixtures or heterogeneous mixtures. Whats not a mixture are elements, like carbon or sulfur. Water is an example of a mixture.

Explanation:

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What is the significance of the single covalent bond in a carbon chains ‘flexibility’? How is this property involved in the form

tiny-mole [99]

Answer:

A. It is significant in that it leads conformational isomerism whereby atoms in a molecule are arranged in different ways with the preferred conformation being the one that is most stable.

B. It leads to resonance in the benzene structure which gives the benzene molecule its very thermodynamically stabile nature.

Explanation:

The carbon-carbon single bond is formed by the sharing of electrons by two neighboring carbon atoms. The shared electron orbitals overlap end-to-end (sigma) and this enables free rotation about their axis. This free rotation is significant in that it leads to the concept of conformational isomerism in organic molecules.

Conformational isomerism has to do with the different ways atoms of an organic molecule are spatially arranged. Thus, organic compounds will take up conformations which gives them the most thermodynamical stability. These spatial arrangements leads to different properties in organic compounds having similar structures.

B. The structure of the benzene molecule shows alternate double and single carbon-carbon bonds in the 6-carbon ring molecule. Double bonds are electron rich and are thus are very reactive. However, the presence of the alternate single bonds between double bonds stabilizes the benzene molecule by giving its bonds an intermediate property of single and double bonds. This concept is known as resonance and accounts for the thermodynamic stability of benzene.

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4 years ago

A state government is trying to decide between using biomass or nuclear power to generate electricity. What advantage does bioma

Ostrovityanka [42]

Answer:

D Biomass produces no radioactive waste

Explanation:

5 0

2 years ago

Which nonmetqls in the atmosphere and their combinations are essential to life on earth?

In-s [12.5K]

Answer:

The acronym CHNOPS, which stands for carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfur, represents the six most important chemical elements whose covalent combinations make up most biological molecules on Earth. All of these elements are nonmetals.

8 0

2 years ago

Please help this will determine my grade so I beg help me out and my grade

Lelu [443]

Answer:

C: checking your email

Explanation:

I believe that C would be impossible, as you cannot use wireless networks without radio waves

7 0

3 years ago

Read 2 more answers

The complete combustion of propane (C3H8) in the presence of oxygen yields CO2 and H2O: C3H8 (g) + 5O2 (g) 3CO2 (g) + 4H2O (g) a

mixas84 [53]

Answer:

26.9 L is the volume of CO₂, we obtained

Explanation:

The reaction is: C₃H₈(g) + 5O₂(g) → 3CO₂ (g) + 4H₂O (g)

Let's determine the reactants moles:

27.5 g . 1mol / 44 g = 0.625 moles

We need density of O₂ to determine mass and then, the moles.

O₂ density = O₂ mass / O₂ volume

O₂ density . O₂ volume = O₂ mass

1.429 g/L . 45L = O₂ mass → 64.3 g

Moles of O₂ → 64.3 g . 1mol/32g = 2.009 moles

Let's find out the limiting reactant:

1 mol of propane needs 5 moles of oxygen to react

Then, 0.625 moles will react with (0.625 . 5)/1 = 3.125 moles of O₂

Oxygen is the limiting reactant, we need 3.125 moles but we only have 2.009 moles

Ratio is 5:3. 5 moles of O₂ produce 3 moles of CO₂

Therefore, 2.009 moles of O₂ must produce (2.009 .3) /5 = 1.21 moles of CO₂. Let's find out the volume, by Ideal Gases Law (STP are 1 atm and 273K, the standard conditions)

1 atm . V = 1.21 moles . 0.082 . 273K

V = (1.21 moles . 0.082 . 273K) / 1atm = 26.9 L

3 0

3 years ago