Question The relative molecular mass of the oxalic acid is 90 and its composition by mass is Carbon = 26.7% Hydrogen = 2.2% Oxygen = 71.1%
Calculate the empirical and molecular formula?

Explanation:

Assume 100 g of acid. Breaking it down into its components, there are

26.68

⋅

g

12.01

⋅

g

⋅

m

o

l

−

1

⋅

C

;

2.24

⋅

g

1.00794

⋅

g

⋅

m

o

l

−

1

⋅

H

;

71.08

⋅

g

16.00

⋅

g

⋅

m

o

l

−

1

⋅

O

=

C

:

H

:

O

=

2.22

:

2.22

:

4.44

=

1

:

1

:

2

.

Therefore, empirical formula of oxalic acid is

C

H

O

2

. If its molecular mass is

90.03

⋅

g

⋅

m

o

l

−

1

, what is its molecular formula?

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

hope it