Chemistry Determining a Molecular Formula from a Diagram: Molecules are sometimes represented as “ball and stick” models. In all of these representatio

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Chemistry

Determining a Molecular Formula from a Diagram:

Molecules are sometimes represented as “ball and stick” models.

In all of these representations, carbon atoms are black or gray; hydrogen atoms are white; oxygen atoms are red, and nitrogen atoms are blue. Those atoms are the ones that we will most commonly encounter. But sometimes, there will be other atoms. For example, in this problem set, sulfur is shown in yellow, and phosphorous is shown in orange.

Here are two molecules that are similar in structure. The molecule on the left has the molecular formula C2H5NO. The molecule on the right is similar, but the red sphere for oxygen is replaced by a yellow sphere for sulfur; thus, its molecular formula is C2H5NS.



Determine the molecular formulas for the four molecules shown below.

1.

2.

3. The yellow sphere is sulfur.

4. The orange sphere is phosphorous.

Determining a Molecular Formula from a Diagram:

Molec

ules are sometimes represented as

ball and

stick

models.

In all of these representations, c

arbon atoms are black

or gray

; hydrogen atoms are white; oxygen atoms

are red, and nitrogen atoms

are blue.

Tho

se atoms are the ones that w

e

will most comm

only encounter.

But s

ometimes, there

will be other a

toms. For example, in this problem set, sulfur is show

n in

yellow,

and phosphorous is

shown in orange.

He

re are two molecules that are

similar

in structure.

The molecule on the left

has

the

molecular

formula

C

2

H

5

NO.

T

he molecu

le on the right

is

sim

ilar, but the red

sphere for

oxy

gen is replaced by a yellow

sphere for

sulfur;

thus, it

s

mole

cular f

ormula

is C

2

H

5

NS.

Determine the molecula

r formulas for

the four molecules shown below.

1.

Determining a Molecular Formula from a Diagram:

Molecules are sometimes represented as “ball and stick” models.

In all of these representations, carbon atoms are black or gray; hydrogen atoms are white; oxygen atoms

are red, and nitrogen atoms are blue. Those atoms are the ones that we will most commonly encounter.

But sometimes, there will be other atoms. For example, in this problem set, sulfur is shown in yellow,

and phosphorous is shown in orange.

Here are two molecules that are similar in structure. The molecule on the left has the molecular formula

C

2

H

5

NO. The molecule on the right is similar, but the red sphere for oxygen is replaced by a yellow

sphere for sulfur; thus, its molecular formula is C

2

H

5

NS.

Determine the molecular formulas for the four molecules shown below.

1.

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