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Chemistry
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Explain the trend in the boiling temperatures of the elements on descending group 7, from fluorine to iodine.

Understanding the question:

The process of boiling is heating the mixture until the liquid turns into gas. This process requires breaking intermolecular forces (interactions between molecule...

BY
Answered by Berna Y. Chemistry tutor
13545 Views

Flask Q (volume = 1.00 x 103 cm3 ) is filled with ammonia (NH3) at 102 kPa and 300 K. Calculate the mass of ammonia in flask Q. (Gas constant R = 8.31 J K−1 mol−1 )

n = PV/RT 102 000 ×(1.00 × 10−3) / 8.31 × 300 = 𝑛 n= (4.091456077x10-2) Mass = n x 17 = 0.696g (3 sig figs only)

AR
Answered by Ashley R. Chemistry tutor
6447 Views

Describe how and explain why vegetable oils are hardened for use in foods.

Vegetable oils are reacted with hydrogen at 60 degrees Celcius in the presence of a nickel catalyst. This process is called hydrogenation. Vegetable oils contain carbon to carbon double bonds meaning they...

RJ
Answered by Rachel J. Chemistry tutor
16227 Views

What is a stereoisomer?

Stereoisomers are molecules with the same structural formula (same number of each type of atom bonded together in the same order e.g. carbon bonded to carbon bonded to oxygen) but with the atoms arranged ...

LG
Answered by Lizzi G. Chemistry tutor
3290 Views

Explain how the electron pair repulsion theory can be used to deduce the shape of, and the bond angle in, PF3 .

Number of electrons from P= 5 e , Number of electrons from 3F = 3 e , Total number of electrons around P = 8 e Therefore there is a total number of 4 electron pairs surrounding P. three of which are bond ...

YA
Answered by Yusuf A. Chemistry tutor
3202 Views

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