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Chemistry

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Christian Sawayn

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Cards in this guide (17)
What is a lone pair

A lone pair is elements in a chemical reaction that are not used in the reaction.

What is the mass in grams of 6.02 x 1023 atoms of sulfur

32g

Which out of the two following molecules is trigonal planar shape NF3 or PCL3

Neither.

Due to the lone pairs on the N and P atoms, both molecules have a trigonal pyramidal shape.

What does percent composition tell you about a molecule

It tells you how much of a molecule is made up of each element. - APEX

Why are prefixes not used in naming ionic compounds

two ions can combine in only one combination

Which conversion factor would be used to convert gmol to gl

mol/l

What shape would a molecule with two bound groups and two lone pairs have

The correct answer is: Bent.

How does the shape of a molecule affect the polarity of the molecule

C.A molecule that has a symmetrical shape will be a nonpolar molecule.

Which element is the reducing agent in a redox reaction

The reactant that has the atom that gets oxidized

What are repelled in the VSEPR theory

Electron pairs

What happens in a reduction

An element gains one or more electrons

What is an example of food engineering

The development of irrigation.

What is a consequence of electron-pair repulsion around an atom

The atoms sharing the electron pairs will spread out around the central atom. Apex

What do dipole-dipole forces do

Hold Polar molecules together

In what way does the shape of a molecule affect how the molecule is involved with living systems

it determines how the molecule functions

How does a lone pair contribute to the molecular shape

The lone pair repels the electrons of the adjacent bonds more so than does a bonding pair of electrons, so thus alters the molecular geometry of the molecule.

Which of the following could be considered a benefit of modern farming techniques

The food we eat is fresher because it is treated with preservatives.

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