Question

mathematical representations quick check
sulfur trioxide reacts with water to form sulfuric acid according to the following reaction:
( so_{3}+h_{2}o
ightarrow h_{2}so_{4} )
sulfuric acid ( (h_{2}so_{4}) ) has the atomic mass of 98 amu, hydrogen ( (h) ) has an atomic mass of 1 amu, and oxygen ( (o) ) has the atomic mass of 16 amu. use this information to figure out the atomic mass of sulfur ( (s) ) and then use that number to calculate the atomic mass of sulfur trioxide ( (so_{3}) )
(1 point)
48 amu
32 amu
116 amu
80 amu

Explanation:

Step1: Calculate atomic mass of sulfur

Atomic mass of \(H_2SO_4\) is \(98\) amu.
Atomic mass of \(H_2\) is \(2\times1 = 2\) amu.
Atomic mass of \(O_4\) is \(4\times16=64\) amu.
Let atomic mass of \(S\) be \(x\).
Then \(2 + x+64=98\).
\(x=98-(2 + 64)=32\) amu.

Step2: Calculate atomic mass of \(SO_3\)

Atomic mass of \(S\) is \(32\) amu.
Atomic mass of \(O_3\) is \(3\times16 = 48\) amu.
Atomic mass of \(SO_3\) is \(32+48=80\) amu.

Answer:

80 amu