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3 years ago

PLEASE HURRY. Which of the molecules below is propyne?

Chemistry

2 answers:

Oduvanchick [21]3 years ago

7 0

The last photo because its molecular formula is C3H4.

Valentin [98]3 years ago

6 0

Answer: Option (D) is the correct answer.

Explanation:

General formula of an alkyne is $C_{n}H_{2n-2}$ .

Suffix "yne" in the name of a compound represents that there is a triple bond present in the compound.

So, a molecule of propyne will have three carbon atoms, four hydrogen atoms and a triple bond. Therefore, there wll be 6 sigma bonds and 2 pi bonds in a propyne molecule.

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DanielleElmas [232]

Answer:

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2 years ago

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Complete the drawing of the product of the diels–alder reaction, ignoring stereochemistry.

shepuryov [24]

Answer:

In Diels alder reaction

It's an Adduct that is fromed from the reactants

Explanation:

I.e diene + dienophile= Adduct

E.g 1,3-butadiene + ethene = cyclohexene

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3 years ago

How is a suspension different from a colloid?

Mashcka [7]

Answer:

Explanation:

Colloidal:

Colloid consist of the particles having size between 1 - 1000 nm i.e, 0.001- 1μm.

The particles in colloid can not be seen through naked eye.

It is homogeneous.

We can not separate the colloidal through the filtration. The pore size of filter paper is 2μm. However it can be separated through the ultra filtration. In ultra filtration the pore size is reduced by soaking the filter paper in gelatin and then in formaldehyde. This is only in case of when solid colloidal is present, if colloid is liquid , there is no solid particles present and ultra filtration can not be used in this case.

Suspension:

The particle size in suspension is greater than 1000 nm.
These particles can seen through naked eye.

It is heterogeneous.
The particles in suspension can be separated through the filtration.

3 0

3 years ago

If you have 3 dozen pennies how many ml of water would they displace

wel

The mass of the displaced fluid can be expressed in terms of the density and its volume, m = ρV. The fluid displaced has a weight W = mg, where g is acceleration due to gravity. Therefore, the weight of the displaced fluid can be expressed as W = ρVg.

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3 years ago

How many atoms are in 4.0 x 10ˉ⁵ grams of Al?

igomit [66]

Answer:

8.9x10¹⁷ atoms of Al are present

Explanation:

To find the number of atoms from the mass of an atom we must convert, as first, the mass to moles using the molar mass of the atom (26.98g/mol For Aluminium).

Then, we must convert the moles to atoms knowing that 1mol = 6.022x10²³ atoms.

<em>Moles Aluminium:</em>

4.0x10⁻⁵g * (1mol / 26.98g) = 1.483x10⁻⁶ moles Al

<em>atoms:</em>

1.483x10⁻⁶ moles Al * (6.022x10²³ atoms / mol) =

<h3>8.9x10¹⁷ atoms of Al are present</h3>

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3 years ago