What is the answer to ____HeP³+_____MgU--->_____He²U³+____

Select the single best answer. Explain the observed trend in the melting points for four isomers of molecular formula C7H16. mp

damaskus [11]

Answer:

The ability of the molecule to pack more tightly increases the melting point.

Explanation:

In hydrocarbons of same molecular formula, melting point is determined by:

weak intermolecular forces
Molecular symmetry

Higher the intermolecular forces and molecular symmetry, higher will be the melting point.

Intermolecular forces in hydrocarbons decreases with branching. Moreover, branching interfere the tight packing of the molecule in the crystal. Therefore, branched hydrocarbons tend to have lower melting point.

However, in highly branched hydrocarbons molecular symmetry increases which results in tight packing of the molecule in the crystal.

So, highly tight packed molecules tend to have high melting point.

As (CH3)2CHC(CH3)3 is highly branched and has high molecular symmetry, therefore, its melting point is highest among given.

So, among the given, option c is correct.

5 0

3 years ago

Which statement is true about sodium hydroxide (NaOH)?

Naya [18.7K]

It's a base because it increases the concentration of hydroxid ions

3 0

3 years ago

Read 2 more answers

BRAINLIESTTT ASAP!!! PLEASE HELP ME :) What makes an investigation credible and reliable?

Andrei [34K]

Answer:

An investigation is credible and reliable if There is enough proof and evidence to support your investigation...

Happy to help

Pls mark as Brainliest.

6 0

3 years ago

Determine the empirical and molecular formula for a compound containing 26.1

kobusy [5.1K]

determing that the compoumd formed is in 100%

therefore, 26.1 +4.3+69.6 = 100%

hence no need of adding O molecule

finding the numbr of moles of each element

no. of moles of C= given mass÷molar mass

=26.1÷12

=2.1 mol

no. of moles of H = given mass÷molar mass

=4.3÷1

=4.3 mol

no of moles of O =given mass÷molar mass

=69.6÷16

=4.3

the simplest whole nber of the element in the unknown compoumd is 1:2:2 of C:H:O

HENCE, the empirical formula is CH2O2

empirical formula mass of CH2O2 IS

=(12)+(2×1)+(16×2)

12+2+32

46 G/MOL

N= molar mass of the compoumd ÷ emporical mass of the compoumd

N= 138÷46

N=3

molecular formula =N×empirical formula

=3 ×CH2O2

C3H6O6 is the molecular formula

(tartonic acid)

hope it helped u!

5 0

3 years ago

What effect does the buoyant force have on a submerged object?

Ipatiy [6.2K]

The buoyant force is an upward force on an object submerged in a fluid. It is the resultant of the pressure force on the surface of the object. The buoyant force may be larger than the weight of the object causing it to accelerate upwards.

Conclusion:

The weight of the water displaced by the object is subtracted from the actual weigh of the object (out of water), leaving the object with a net positive weight while submerged.

7 0

3 years ago

What is the answer to ____HeP³+_____MgU--->_____He²U³+_____MgP²​

What is the answer to __HeP³+_MgU--->_He²U³+___MgP²